Archive of Our Own ^beta

Chapter Text

They met on a forum about bot-building. NinjaFighter seemed like a goody-two-shoes obsessed with listing by-laws on bot-fighting under every comment that even referenced it. 

He got downvoted a whole bunch, but he more than made up for it with upvotes on comments that showed his tech know-how. He’s generally helpful to the community when it comes to building, even writing walkthroughs for more advanced mechanics. 

In fact, when Hiro started building his nanobots, NinjaFighter answered his questions and even gave him ideas for applications for it that he didn’t think of. They chatted back and forth, and soon Hiro got more excited to check his messages as MegabotBoy than his own texts. They sent each other memes, theories about the comics they read, and even life updates. Besides Tadashi, Hiro never felt so in tune with anyone. 

It’s like NinjaFighter knew exactly what would make him laugh and he was always there for him when he had a shitty day. Whenever he pulls an all-nighter, NinjaFighter’s messages would help him through.

Before long, he learns all kinds of things about NinjaFighter, like the fact he’s an alpha a few years older than Hiro. He’s very idealistic and wants to change the way people see bots and their potential for good. That’s obvious from his public posts, but one thing no one else knew is that NinjaFighter is an orphan too. Not having an alpha role model at a young age has been scary, so he wants to make bots that help take care of people.

Hiro never really thought about having an omega role model. He made bots to fight at first because it helped him feel strong when he was always smaller and weaker than all his classmates. He always looked up to Tadashi, until he realized his admiration was becoming a borderline crush. That was the wake-up call Hiro needed and he started putting some distance between them. 

But he doesn’t need to rely on Tadashi anymore. NinjaFighter gives him the kind of push he needs, not just to take his projects further, but to deal with life. NinjaFighter is supportive, sarcastic, hilarious, and Hiro’s best friend. Whenever Hiro gets a new message from NinjaFighter, he can’t help smiling, or the mushy warm feeling flooding his heart. Even when they are just talking about their day or being silly.

So when NinjaFighter got his first job, Hiro sends him bento box emojis as a joke. Even though technically he’ll start Monday and not the weekend.

NinjaFighter: Aww, a bento box? Are you my boyfriend now?

MegabotBoy: Yep. I love you.

Wait what?

Hiro didn’t even think about it before he sent it. He starts typing to play it off as a joke. 

NinjaFighter: I love you too.

Hiro stops, his heart caught in his throat. 

Really? Does he mean it? Hiro feels warm and nervous. For once, he doesn’t have a smart response. But even he knows it’s not good to leave someone on read when they say I love you too. 

What should Hiro say?

He types something quickly.

MegabotBoy: So…do we have phone sex now?

Ahhh! It’s Hiro’s defence mechanism to just make weird jokes. He doesn’t know what else to say!

NinjaFighter starts typing. 

Double ahhh! Did Hiro just a can of worms he’s not ready for? 

MegabotBoy: I was just joking!!

NinjaFighter stops typing. Then he starts again.

NinjaFighter: About being my boyfriend? Or the phone sex?

Hiro stares. He never felt awkward chatting with NinjaFighter before. Now his feelings are squirming everywhere and he’s worried he made their friendship weird.

MegabotBoy: Tbh you’re my best friend. I love you man. I don’t have a lot of experience with this lol so not sure what happens now

NinjaFighter starts typing again.

Oh god, this is a long one. It reminds of Hiro of the rants NinjaFighter would have about bot-fighting being illegal whenever Hiro used to comment on events he wanted to go to.

NinjaFighter: That’s okay. We can take things slow. As long as I’m the only one…I don’t think it’s a good idea if you try having phone sex with other people on the internet. You never know who might be out there. You shouldn’t just trust anyone you meet online. Be more careful!

Hiro rolls his eyes. Of course he would give him a lecture. That goody-two shoes.

MegabotBoy: Of course you’re the only one.

NinjaFighter: Good.

Maybe the omega can egg him on a little.

MegabotBoy: So can I send you pics of my naked body? Spread my omega hole for you? ;)

NinjaFighter: No. You should never send any indecent photos that might identify you. You don’t need to expose yourself for me to love you. 

Hiro’s heart stutters when he reads the word love. NinjaFighter really is sweet.

MegabotBoy: Wow you’re no fun. I would have covered my face.

NinjaFighter: I know you’re joking but you really shouldn’t send messages like that to a horny alpha. What if there were items or places in the background of your photos that made it easy for me to find you? You never know who could be dangerous.

NinjaFighter: Please be more careful love.

MegabotBoy: OKAY INTERNET BOYFRIEND! Or are you my internet alpha daddy? 

NinjaFighter: We can sext if you want. But that’s it. 

Hiro makes sure there’s nothing in the background and sends a photo of him sticking out his tongue. His face is cut off from the mouth down, showing only collarbone, chest and a pink nipple.

MegabotBoy: What about this? <3 You can’t tell who or where I am. 

The wifi is a bit slow so the photo is still loading.

Suddenly, there’s a knock on his door. Hiro jumps. Well this is horrible timing. 

“I’m busy!!”

“Hiro, I need your help,” Tadashi calls. 

Oh right, his brother is officially moving out today. Most of his stuff is already gone. Right after Tadashi graduated, he got funding to further develop his startup Baymax Inc. at the top incubator in San Fransokyo, Alphabeta Labs. 

He’s been slowly moving his things to the Alphabeta campus where his new place is. He stays there more nights than not now. Hiro pretends he can’t wait to have the whole room to himself but he actually misses Tadashi a lot. 

The alpha has been working lots of late nights making new models for Baymax specific for alpha, beta, and omega patients. Now that he’s proved the basic Baymax model, the demand for customized care has skyrocketed. 

Hiro’s happy for his brother’s success of course, which is why he doesn’t want Tadashi to know it makes him sad he’s leaving. Tadashi literally would move back in just to make Hiro feel better. The omega doesn’t want to hold his brother back.

Hiro pulls his shirt back on and opens the door. 

“Hey Hiro,” Tadashi says, raising an eyebrow. “I know you probably miss me like crazy but you can’t keep my stuff locked in here.”

Hiro makes a face.

“What are you talking about? I can’t wait to have the whole pad to myself.”

Tadashi rolls his eyes and grabs his mattress. Hiro helps, even though the alpha does most of the lifting. It’s mainly positioning it down the stairs. 

“Wait, don’t they give you a bed at the campus?” Hiro says as they toss the mattress into the moving van. 

“Yeah but if you wanted to come visit overnight, then you’d need a mattress too.”

Now it’s Hiro’s turn to roll his eyes. As though his brother has time to host Hiro! He’s so busy with work, it’s a wonder he still has time to go to the gym and still visit him and Aunt Cas every other weekend. 

“Like you have any time for me.”

Tadashi stops. Then he turns and clasps his hands on Hiro’s shoulders. 

“I always want to spend time with you. You know that right?” The alpha’s voice is so sincere it makes Hiro a little melty inside. 

The omega feels lucky he has NinjaFighter to keep his mind off of Tadashi. He confessed to NinjaFighter once a long time ago of his unrequited crush on an older alpha. Of course he left out the fact it was his big brother. 

NinjaFighter had so many encouraging things to say about Hiro and even listed all the things that he has going for him. He said that alphas are dumb and only want one thing so Hiro should focus on being awesome instead. That’s when the omega knew for a fact NinjaFighter is a good guy.

“Well, I want to come and build with you.” Hiro’s nanobots could be a great support system for Baymax to use, even though he hasn’t quite gotten it wired to the AI’s commands yet. 

Despite nanobots being a powerful game-changer, is it also prone to accidents and mass destruction without the proper fail-safes in place. It’s super boring limiting your own invention so Hiro has been putting it off. Tadashi is always telling him to keep working on it, and so does NinjaFighter. 

But Hiro is hoping that getting Baymax to use it would make sure no human uses it for evil. Tadashi says that’s just a shortcut and he still needs to put limits on his invention.

“Or we can just hang out,” Tadashi says, squeezing Hiro on the cheek.

Ugh, he is not a little kid anymore! But before he can say anything, the alpha is already going back in to get the last of his things.

Hiro checks his phone. It looks like NinjaFighter hasn’t seen his last message yet. Oh wait, it just says seen. 

He hears a bunch of things clatter to the floor from upstairs. When he goes to help Tadashi, he notices the alpha is a little pink. He gets on his tiptoes and puts his hand on his brother’s forehead.

“Are you getting a fever from overworking ‘Dashi?”

But Tadashi avoids his eyes and gets back to packing.

Sheesh, what a workaholic! 

~

NinjaFighter: You’re beautiful baby.

Took him long enough to respond! 

MegabotBoy: Don’t sell my pics on the internet ;) 

Hiro hopes NinjaFighter will send him a picture too. He seems fit since he talks about going to the gym and getting lots of free things when he goes to the store. Hiro gets freebies too, but it’s more because he’s short and cute.

The omega’s only form of exercise is running. He was mainly from thugs at first or just running late to class. Then it became a habit. He has a bit of a martial arts background from Tadashi, so he does parkour sometimes too. His nanobots are always there to catch him if he falls and he loves discovering new routes around the city.

Most of the time he doesn’t work out his arms as much, which means all the heavy lifting today made him so hungry. Fortunately, Aunt Cas brought approximately twelve boxes of tupperware with meal prep for Tadashi.

Their first official housewarming dinner at Tadashi’s new place is a very hearty meal. There’s shrimp salad with Aunt Cas’ signature sauce and lasagna mashed potatoes. Hiro actually helped with that too.

After dinner, Hiro offers to do the dishes, but Tadashi takes over. Hiro insists on helping but his big brother splashes him and flicks him with foam. In all the shouting and laughing, Tadashi’s phone slips from the corner of the counter. Hiro catches it and Tadashi quickly grabs it out of his hand.

Huh. Weird.

Hiro was only ever that jumpy when he was hiding his bot-fights. The omega narrows his eyes in suspicion at the phone in Tadashi’s back pocket.

“What are you hiding Tadashi? New girlfriend?”

The alpha actually turns red! Did Tadashi really find someone?

“I have a new boyfriend,” Hiro offers, hoping it’ll get the alpha to spill. 

Tadashi frowns.

“Who?”

“I met him on the internet.”

The alpha feigns nonchalance. Something is making him uncomfortable. 

“Sounds so trustworthy.” Damn Tadashi can be snarky.

“Relax, he’s even more protective than you. He was always on my ass about dangers of bot-fighting and sharing photos on the internet.”

Tadashi chokes.

“Uhm. You really shouldn’t be sharing photos of yourself on the internet with strangers.” The alpha scrubs the dishes harder.

“Well, what about your boo? How’d you two meet?”

Tadashi ignores him in favour of the dishes.

That’s it. Hiro has to know. He snatches the phone out of Tadashi’s jeans and runs away.

“HIRO! GET BACK HERE!”

The omega laughs. Tadashi might be bigger and stronger, but Hiro is faster. There are enough moving boxes around that Hiro can weave through and keep Tadashi from reaching him.

But then Hiro makes a left around the dining table and Tadashi makes a right. The alpha grabs the omega by the hood. Fortunately, Hiro’s hoods are all detachable and he breaks free. He runs to the washroom and locks himself in.

“Boys?! Quit horsing around!” Aunt Cas calls. She’s been putting plants out in the balcony and readjusting them for feng shui for the past twenty minutes.

KNOCK KNOCK KNOCK!

“Hiro, this isn’t funny,” Tadashi growls. “Don’t make me spank you.”

The omega shivers.

He’s never heard his brother this angry before. That means he must be on to something! The omega taps the screen, but of course, there’s a passcode. Tadashi is all about internet security. He even set up a private proxy for their entire family. The alpha is so paranoid, even his notifications are secret. It only shows what app it’s from and none of the messages inside.

KNOCK KNOCK KNOCK!

“I’m giving you THREE SECONDS to open up or I’m kicking down the door.”

Jeez. Dramatic much?

“You can’t do that! Alphabeta campus will think you’re a brute!” Hiro taunts.

The omega knows his brother can never stay mad at him for long. Besides, why is Tadashi so concerned? Surely there’s nothing on there that’s that bad. Hiro is the criminal in the family anyway.

“Hiro, if you come out now I’ll let you test nanobots on Baymax.” 

Hiro snickers. Is the alpha seriously trying to bribe him? Haha, he can’t be bought, even with such a tempting offer.

What could have gotten Tadashi so rattled? Hiro decides to pretend to agree to stall.

“Really? We can work together again?” Hiro says.

Then Hiro sees a notification for an upvote pop up on Tadashi’s phone. It’s from Redchan, the same app Hiro talks to NinjaFighter on. It’s pretty popular and well-known for its many forums.

“Yes, but only if you come out right now.”

Huh. He’s got a strange feeling about this.

“And you’ll let me work on campus with you?”

“Yes! Anything!” Tadashi rattles the door harder.

A crazy thought enters Hiro’s mind. It’s an insane theory but it would explain Tadashi’s behaviour.

No, that would be crazy. It can’t be. 

“HIRO?!”

On a whim, Hiro messages NinjaFighter an emoji. 

Tadashi gets a new message notification. 

It’s silent but it’s there. 

Hiro stares, stunned. That must be a coincidence, right?

“That’s it! You have three seconds!” Tadashi shouts.

“THREE!”

Hiro messages NinjaFighter again. Another notification. 

Hiro’s blood goes cold.

“TWO!”

Hiro tries one more time. AGAIN a notification.

“ONE!”

Chapter Text

The omega opens the door right before Tadashi was about to break in.

“Hiro-”

“Are you NinjaFighter?” Hiro says, voice shaking. No, of course he isn’t. There must be another explanation.

But his brother freezes. Just for a millisecond, before he snatches his phone back.

“What are you talking about?” Tadashi says easily, looking at the case as though checking for damage. He doesn’t even bat an eye at the new message notifications.

Hiro stares. What. The. Fuck. Is he the one who’s going insane? He pulls out his messages with NinjaFighter on his own phone.

“Are you NinjaFighter, the anti bot-fighter who’s been messaging me for the last FOUR YEARS of my life?’

Hiro scrolls up, past his photo and shoves the messages at Tadashi’s face.

“I don’t know what you mean. I don’t go on bot-fighting forums,” Tadashi says, looking at Hiro’s phone and back at him, confused.

Is his brother a really good actor? Or is Hiro just paranoid? But that’s three messages in a row Hiro sent and Tadashi got a new message notification. What are the odds of that?

“Hey, I should be the one who’s angry at you for taking my phone. Not cool.” The alpha says, shaking his head. “You know I value my privacy.”

“Show me your Redchan app,” Hiro says, crossing his arms.

“What are you, my jealous boyfriend?”

Hiro flinches. 

Tadashi’s eyes widen. Hiro sees the flash of guilt.

Holy shit. It is him.

The omega blinks. Then he slams the washroom door shut and locks it. He slides to the ground, feeling like the world’s stupidest omega.

How could he be so dumb? The more he thinks about it, the more obvious it is.

NinjaFighter always seemed to know what to say. He’s a charming, kind, and supportive alpha. Just like his brother. Their political views are pretty much identical!

God, Hiro is such a freaking idiot. Tadashi probably wanted to keep an eye on him or something. He sent his brother that picture.

There’s a soft knock at the door.

“Hiro? Please let me in.”

The omega covers his ears.

“Go away! I need to think,” he shouts, a horrified tear sliding down his cheek.

He wishes he could just put his headphones in and blast the playlist he listens to whenever he feels overwhelmed. The one that NinjaFighter recommended half the songs to.

Oh god. NinjaFighter had helped him come up with so many of his coping mechanisms. 

Hiro feels sick.

He’s just sitting there numb, thinking about how his best friend isn’t real. He doesn’t know how long he sits there until his mind starts racing in a new direction. He wants answers! And to get it, he needs to focus.

He has to analyze the chain of events and figure out how the FUCK this could have happened. He scrolls through the last dozen messages NinjaFighter sent today and starts reading it from the top.

He begins right after he sent NinjaFighter the bento box emoji.

NinjaFighter: Aww, a bento box? Are you my boyfriend now?

God, why would Tadashi say that? This is so misleading!

MegabotBoy: Yep. I love you.

NinjaFighter: I love you too.

It’s so damn embarrassing that Hiro thought he meant as more than friends or brothers.

MegabotBoy: So…do we have phone sex now?

MegabotBoy: I was just joking!!

NinjaFighter: About being my boyfriend? Or the phone sex?

Ughhhhh that would have been the perfect opportunity for Tadashi to say ‘ Haha, good one’ or something. Why the hell would he pursue this?

This is so painful to read but he has to if he wants to understand.

MegabotBoy: Tbh you’re my best friend. I love you man. I don’t have a lot of experience with this lol so not sure what happens now

NinjaFighter: That’s okay. We can take things slow. As long as I’m the only one…I don’t think it’s a good idea if you try having phone sex with other people on the internet. You never know who might be out there. You shouldn’t just trust anyone you meet online. Be more careful!

WTF how the hell did Tadashi’s protectiveness make him think being Hiro’s internet boyfriend is the only way to stop him from having phone sex with other people? It’s not like Hiro actually does that.

The messages just go downhill from there. Admittedly, most of it is Hiro’s fault. 

MegabotBoy: Of course you’re the only one.

NinjaFighter: Good.

That’s not the bad part yet. This is.

MegabotBoy: So can I send you pics of my naked body? Spread my omega hole for you? ;)

What the FUCK was Hiro’s horny lovestruck self thinking?

NinjaFighter: No. You should never send any indecent photos that might identify you. You don’t need to expose yourself for me to love you. 

He can’t believe Tadashi saw that as a teaching moment. Only Tadashi with his infinite kindness and misguided righteousness. Jesus.

MegabotBoy: Wow you’re no fun. I would have covered my face.

NinjaFighter: I know you’re joking but you really shouldn’t send messages like that to a horny alpha. What if there were items or places in the background of your photos that made it easy for me to find you? You never know who could be dangerous.

Now the lectures make so much sense. What the hell, how could Hiro be so stupid? 

NinjaFighter: Please be more careful love.

But also WHY did Tadashi call him love? And why does it make him feel all warm and giddy? Stupid stupid stupid.

MegabotBoy: OKAY INTERNET BOYFRIEND! Or are you my internet alpha daddy? 

Hiro pales. He called Tadashi alpha daddy. Seriously, how could this be his life. 

NinjaFighter: We can sext if you want. But that’s it. 

Hiro moans in despair, burying his head in his knees. It is so extremely obvious now that Tadashi just thought he was way too horny for his own good and wanted to protect him by being the only one Hiro sent photos to. He knows rationally Tadashi only did this because he cares, but he still feels a deep pang of betrayal.

His cheeks colour with shame. He can’t believe he sent that picture of himself thinking he was being sexy! Tadashi probably thought he was just being a dumb horny kid!

He wishes more than ever he could be a video game character and just reset to the last save point. How could he face his brother again?

Because Hiro must be a masochist, he keeps scrolling past his photo. 

MegabotBoy: What about this? <3 You can’t tell who or where I am. 

NinjaFighter: You’re beautiful baby.

Tadashi probably was grossed out and uncomfortable. But he still said he was beautiful.

The alpha wanted him to have a good self-esteem and supported him all these years as a stranger on the internet.

Hiro shakes his head. No. He needs to stop idolizing his brother. This is still completely fucked up. Even if his brother just wanted to protect him, there’s no explanation that can make this okay. There were so many opportunities for him to de-escalate or stop responding to Hiro’s flirting. 

Hiro thought he was in love. In love!! What a joke.

There’s another soft knock on the door.

“Hiro, Aunt Cas is going to be worried if you don’t come out. Please, just for her sake-”

“Shut up you asshole,” Hiro says lowly. “I’ll come out when I’m ready, stop using Aunt Cas to try to get me to do what you want.”

The omega says the last part so nastily he almost feels bad. Almost. Tadashi should feel bad for putting him through this!!

The alpha doesn’t say anything. 

Hiro takes a deep breath and rubs the tears off his face. He’s angry, not sad. ANGRY not sad. Not heartbroken. Not- Hiro breaks into a sob. His brother must be able to hear that.

“I’m really sorry Hiro. I never meant to hurt you. I didn’t want you to find out this way-”

“What part of shut up don’t you understand?” The omega says brokenly.

“I’m sorry,” Tadashi whispers after a moment. Then there’s a click and the door unlocks.

The omega jumps.

Hiro didn’t notice his brother picking the lock. But now Tadashi’s in the washroom with him.

At the sight of his brother, all his anger threatens to return.

But Tadashi is right. 

Aunt Cas is right outside, and if they made a fuss then she would get to the bottom of why they’re fighting. The only thing that could make this situation worse is if Aunt Cas saw the photo he sent.

Ugh, he still feels like such a fucking idiot.

“Tell Aunt Cas I want to stay over tonight. We need to talk,” Hiro says, crossing his arms. 

Fuck Tadashi and his concern. He caused this! The alpha takes a step closer. He reaches for Hiro’s waist.

Hiro glares and turns away from Tadashi’s attempt to hug him.

At least the alpha looks as miserable as he feels. But Tadashi will never know what it feels like to lose someone he thought was his best friend, possibly a lover, and find out that wasn’t a real person. 

“Sure Hiro, anything you want. Just please don’t lock the door on me again.”

The alpha leaves the washroom.

Hiro does his best to pull himself together, wiping the tears off his face.

Then there’s another knock on the door.

“Hiro? You’re staying over tonight?”

“Yeah Aunt Cas. Just a little stomachache right now. You can go on home first.” The omega looks more normal now, but his eyes are still a little puffy. At least his voice sounds more even.

Aunt Cas says something chirpy and bright but Hiro isn’t really listening.

He locks the door again.

He doesn’t want Tadashi seeing him like this.

Then the doorknob rattles.

“Hiro,” Tadashi sighs. “I got you some water, please let me give it to you.”

Hiro doesn’t respond. How dare he sigh as though Hiro is the one acting weird! He didn’t forget that his brother had the gall to pretend he didn’t know what he was talking about when he first confronted him! The thought makes him burn.

“You can go to the guest bedroom after if you don’t want to see me again tonight. Just please take the water. I’m walking away now.”

The omega hears the alpha’s footsteps leave.

After a minute, he opens the door. He is a bit thirsty from all the crying. Besides, he shouldn’t have to hide! This is all Tadashi’s fault! Well, at least half his fault.

He sees his water on the table and his favourite matcha KitKat. There’s also a box of tissues that wasn’t there before.

Hiro takes a step forward. Tadashi is nowhere to be seen.

Hiro goes to the table and takes a seat. His throat is drier than he thought and the water feels so nice and cool that he drinks it all. He opens the wrapper and chews on the chocolate.

It does make him feel a teensy bit better.

He looks across the kitchen and catches a glimpse of Tadashi’s reflection in the microwave. He’s standing so that Hiro can’t see him behind the kitchen column. Now he meets his eye through the reflection.

“Can I come sit with you?” Tadashi says gently. 

Hiro pauses.

“Only if I get ice cream too.” Hiro grumbles.

It comes but less angry and more petulant than he’d like. He’s angry, he reminds himself.

Tadashi lets out a soft laugh. He opens the fridge and pulls out chocolate matcha ice cream. It’s one of those flavours they love to share. Usually, Tadashi eats the chocolate side and Hiro the matcha side. But he pulls out two bowls this time instead of one like always.

“Wait!” Hiro says. Tadashi stops.

“I only want a little, so one bowl is good for the both of us.”

The alpha smiles and puts one of the bowls away. He scoops the ice cream and then takes the seat next to Hiro. There’s only one spoon.

The omega grabs it and puts a giant bite in his mouth. Tadashi is staring at his mouth, probably wondering how he could fit so much ice cream in there. Or maybe he’s thinking of Hiro biting his lip in the photo he sent? Oh god.

That thought makes him burn. His heart is still a wreck knowing that NinjaFighter isn’t real, and there’s so much he has to unpackage. 

But he’s cried enough tonight. 

Anger is a safer emotion. The omega puts the spoon down and swallows the giant lump of matcha as fast as possible. It takes a few bites before it goes down his throat.

Hiro licks his lips, thinking of where to start. But Tadashi starts speaking first.

“I’m sorry Hiro. I wanted to be someone else because I wanted you to feel like you can tell me anything. I thought we were drifting away, and I didn’t mean for-”

Ugh the alpha sounds so earnest and concerned it’s annoying.

“You LIED to me Tadashi! You made me believe there was someone th-that actually loved me and wanted me and that is fucked up.”

“I’m sorry I mislead you, but I do love you. I just wanted to be a part of your life.”

By pretending to be his boyfriend?! By being willing to sext with him? 

“What the fuck is wrong with you?”

“I care about you Hiro. You used to tell me everything and when you stopped, I wanted to find a way to connect with you.”

Hiro is so angry he’s tearing up again. Stupid omega emotions.

“That is NOT the way to do that!” 

All the emotions he’s been feeling comes rushing out again. He can’t deal with it all. He gets up to run away again, but Tadashi catches his waist.

Hiro snarls. He turns and punches his brother in the chest. Hard.

His fist is numb and achey but the alpha still holds on. 

“I’m sorry. You can punch me as many times as you want. But I still love you.”

Hiro cries angry tears into his chest. No! He didn’t want their conversation to go like this! He didn’t want to make a fool of himself again! 

But Tadashi rubs his neck and his back. It has no right to feel this good, but it does make him feel steadier. It always calmed him when he was a kid and it calms him now. He hates that it does.

He hates that despite the betrayal, he feels so safe in his brother’s arms.

He thought he finally got over his crush on his oniisan and found someone who could really cherish him. But it still turned out to just be overprotective Tadashi.

“I love you so much Hiro. I never meant to hurt you,” the alpha repeats softly. “I’m sorry.”

Hiro looks up, face shining with tears. Tadashi wipes them away, as gentle as he did when Hiro fell off his bike as a little kid. Then the alpha kisses his forehead. Like he’s a baby with a boo boo.

Well, Hiro’s not a kid anymore! And his handsome alpha brother can’t keep treating him like one.

Doesn’t he know what it does to him when he holds him like this? The kisses he gives him are so soft it sends tingles all over Hiro’s body. What’s worse is the tender feeling that envelopes his heart, warming his whole body.

Oh god. He’s still in love with his brother. His stupidly kind alpha brother with his beautiful jawline and full lipped smile. His kind, caring nii-san, who is looking at him like he’s a kicked puppy. 

Hiro is not a puppy. And there’s only one way to show him.

Hiro holds Tadashi’s face and kisses him on the mouth. 

Chapter Text

Tadashi freezes. But he doesn’t pull away. 

Hiro licks the alpha’s lower lip and moves his tongue slowly, sensually, so his brother can tell exactly how not a kid he is. 

Then Tadashi is moving his mouth against Hiro’s, deepening the kiss.

What is going on?

Tadashi’s tongue slides against his, the alpha’s hands in Hiro’s messy hair. His other hand is holding the omega’s back. Hiro stifles a moan.

“Mmmph Tadashi stop!” Hiro pushes his brother away. “What the hell?”

Tadashi looks at him, confused. 

“This is exactly what’s wrong with you! You can’t just go along with whatever I want!” Hiro exclaims. 

The alpha takes a deep breath, as though Hiro is the one who’s exasperating. After a long moment, he finally speaks.

“Hiro. I’m sorry you’re disappointed that NinjaFighter isn’t who you thought it was. But I meant every word I said.” Tadashi looks Hiro dead in the eye. “I love you.”

Hiro stops breathing.

“W-what?”

His brother must be trying to say he still loves Hiro, even thought it’s not in the way he thinks. And he’s willing to get punched and make out with Hiro to make him feel better. Which is stupid and self-sacrificing and exactly what Tadashi would do. Hiro is about to tell him that when-

“I love you. I want to be your boyfriend,” the alpha says.

Then Tadashi cups Hiro’s face and kisses him again. With tongue. 

Wait.

What. Is. Happening.

“Where is this coming from?” Hiro gasps.

“I don’t want you to date anyone else or experiment with the urges you have with another alpha. I want to take care of you in every way,” Tadashi explains.

Wow. He is really going overboard as the overprotective alpha brother.

“I want you to come to me with your problems, your dreams, everything. I want to be the one who’s there for you,” Tadashi murmurs, before kissing Hiro yet again.

“Are you serious? You want to be my boyfriend?

The alpha nods.

Hiro still can’t believe it. 

He’s not going to sit here and take these ridiculous statements and this fake kissing. He cannot accept that Tadashi wants to be his boyfriend. And he’s going to prove that Tadashi doesn’t mean it, he’s just overly protective.

“Then you’ll sleep in the same bed with me?” Hiro goads.

Tadashi nods.

“Anything you want.”

Hiro looks at him skeptically. Let’s see how long his brother lasts as his so-called ‘boyfriend’.

~

Hiro ended up taking the guest room because he was still too freaked out by everything that happened. But Tadashi is really sticking with the whole I want to be your boyfriend narrative.

Hiro scoffs.

Like that’s going to last! Tadashi’s going to have his own life and meet other omegas that he’s actually interested in. Not just interested in protecting.

Maybe it’s because they lost their parents at such a young age Tadashi thinks he has to take care of him.

The omega sighs. This is really not healthy. But it’s not like he can talk things out with his brother now.

Even though it’s Sunday, Tadashi still has a lot to catch up with for work. He left before Hiro even woke up. He sent Hiro a few photos from the lab, probably to make up for literally tricking him into thinking he met a best friend and lover online.

Come to think of it, is this whole being his boyfriend thing Tadashi’s way of making it up to him? Ridiculous. 

Hiro heads back to Aunt Cas’ to pick up his laptop and do some of his own research. He met another specialist on a Redchan forum that says they are experienced with creating restrictions on overpowered tech. Hiro planned to have a video call with them and pick their brain on some ways he can make his nanobots more commercial friendly.

Normally he would tell NinjaFighter all about it, but for the first time in years, he hasn’t messaged him all morning.

But he wonders if he should. NinjaFighter does know a lot of the other users on the threads about bots. Maybe he’ll know if this guy or gal is legit.

MegabotBoy: Hey.

He hasn’t sent such a short message to NinjaFighter in years. But he’s just testing the waters.

NinjaFighter: Hi :) Did you have the omelette I left for you in the fridge?

Hiro blinks. The omega literally left as soon as he woke up. Well after he brushed his teeth and washed his face.

MegabotBoy: I had to run home kind of fast.

NinjaFighter: Wait. Did you not have breakfast? It’s the most important meal of the day.

MegabotBoy: Okay DAD. 

He did eat a carrot muffin when he got to the cafe.

MegabotBoy: I wanted to ask about a user I’m having a video call with. Their name is Hydroleum. Some of their history is private, wanted to check if they’re legit.

NinjaFighter: Sure, I’ll get back to you. 

Wait. Isn’t Tadashi busy with Baymax? Maybe he shouldn’t be bothering his brother.

MegabotBoy: It’s okay if you’re busy with Baymax. I can just figure it out in the call.

NinjaFighter: Dw about it. Yeah, they seem legit. 

MegabotBoy: Thanks! :)

NinjaFighter: *pats head*

Hiro stares at the message, a blush creeping across his cheeks. Tadashi hasn’t pet his head ever since he started ducking away from them (because it began making him feel all warm and sticky inside).

Hiro has braved thugs and mean cops and bullies before but now he feels all shy and meek.

He puts the phone away. He needs to get his head out of the gutter! Not leaning into head pats or getting cuddles.

Hiro goes to take a shower and get ready for his video call.

~

The rest of the day goes well. Hydroleum is a dorky middle-aged woman with lots of insight. She thinks Hiro is adorable and she was willing to volunteer some of her time to help out. He made some steady progress with the nanobots and he feels a lot better about it. He’s not crippling his invention, he’s villain-proofing them.

After dinner with Aunt Cas, Hiro wonders what Tadashi is having. She says she made him mushroom linguini, which is his favourite. But did Tadashi have time to defrost and prep it?

Hiro glances at his last message for him on Redchan.

NinjaFighter: *pats head*

Ah, he doesn’t know how to respond to that! An emoji?

No, he’ll just text Tadashi.

Hiro: Hey did you have dinner yet? 

The omega helps Aunt Cas with the dishes and checks his phone again. No response.

Maybe Tadashi is out having dinner with fellow incubator members, having a good time. But it seems more likely Tadashi has just been working hard all day and forgot.

Hiro calls his brother. He lets it ring for a minute. 

There’s no response. 

Well, at least it’s not a pretty girl that picked up instead to tell him Tadashi’s busy. 

Ah, why is Hiro thinking like a jealous boyfriend? His brother is probably just working late. 

Maybe Hiro should bring him dinner. Unless he just ordered food and had some. Or had what Aunt Cas brought. Okay, Hiro is seriously overthinking this right now. He’ll just get Tadashi dinner and if he already had some it can be his lunch tomorrow. Or Hiro’s lunch tomorrow.

Whatever! He’s not making excuses to see Tadashi or anything! 

Hiro takes a deep breath. He’s spiralling again. 

Then the omega’s phone rings. It’s Tadashi!

“Hi Hiro, how’s it going?”

“Hey! Did you have dinner yet?”

“No, got caught up with some upgrades. Running diagnostics now. How was your chat with Hydroleum- ”

“I’ll come bring you food!” Hiro blurts out.

“Alright, sure.” 

Hiro can hear Tadashi’s grin. 

“Okay! Cool! Bye,” the omega hangs up.

He takes a deep breath. Chill. This is just his brother. That he’s in love with. But still just his brother! 

Hiro takes another deep breath. He is going to act totally normal! 

~

When he gets to Alphabeta Labs, the sky is indigo pink with little wispy curls of cloud peppered across the horizon. The security systems recognize Hiro’s face as a guest and he takes a segway through campus. It’s a fun and breezy ride, Hiro’s light jacket flapping in the wind.

The space is relatively quiet, since it’s a Sunday evening. The gentle sounds of birds chirping put Hiro’s mind at ease. 

He gets to the building Tadashi is working in and the alpha buzzes him in. Hiro looks around, as amazed as he was when he first went into SFIT’s nerd lab. There are all kinds of medical bots around in various states of development. Hiro wonders how nanobots could complement each and every one of them.

POSSIBLE ALLERGEN DETECTED! MUST REMOVE! 

A disc-like cleanerbot expands into a tall cylinder and points a laser at Hiro’s takeout bag. Maybe he shouldn’t have gotten the peanut crumbs on the sweet and sour pork rice? Hiro puts the Segway on manual and zooms away from the cleanerbot, who is spraying him with disinfectant.

By the time he gets into Tadashi’s lab, he’s flushed from all the excitement. The cleanerbot is still outside, spraying.

The alpha stares, amused.

“What kind of trouble are you getting in?” 

“Um, I just put my life in danger to get you dinner. You’re welcome,” Hiro says dramatically.

He takes the seat next to Tadashi. The work area is surprisingly clean. He asks about that, and the alpha says new models of Baymax can clear up spaces from hazards too so that an environment is safe for healthcare.

“Isn’t it ironic that you are working on a healthcare robot without taking care of yourself?” Hiro takes out Tadashi’s dinner. “Dinner is the most delicious meal of the day.”

Instead of eating the food, Tadashi pulls Hiro into a big hug. 

“I’m so happy to see you,” the alpha murmurs into his ear. 

He kisses Hiro on his cheek and then his mouth. Tadashi’s tongue barely brushes his, but the quick touch makes the omega feel warm all over.

“I’m glad you’re not mad at me anymore,” Tadashi grins. “I hate it when we fight.”

Hiro gapes. He can’t believe he almost forgot about being upset. Now he’s all breathless from that kiss it’s hard to think clearly.

“You tricked me,” Hiro accuses, frowny again. “Are you just being my boyfriend so I won’t be mad at you?”

Tadashi gives him a wounded expression. It’s a bit exaggerated but somehow it still works. 

The alpha is too handsome and charismatic and manipulative for his own good! Suddenly Hiro remembers how adamant he was that he had no idea what Hiro was talking about when he first asked him if he was NinjaFighter. What if he’s just playing a bit now?

Tadashi did trick Hiro into checking out SFIT to begin with by pretending he would give him a ride to a bot-fight.

“And you tried to gaslight me yesterday! Pretending you didn’t know what I was talking about!” Hiro says, crossing his arms. “You manipulated me and I almost believed you. I thought I was crazy!”

Tadashi actually looks a little guilty now. But is it just an act?

“Yeah, I can be manipulative. I’m sorry.” 

Hiro opens his mouth. Then he closes it again. Now that Tadashi admits it, that takes some of the fight out of him.

Tadashi pulls him close again. He puts his phone into Hiro’s hand.

“The passcode is your birthday. Month and day. I promise I won’t hide anything I do from you anymore.”

Hiro shakes his head and pushes the phone back.

“I don’t need to know everything you’re doing.” 

Then he stops. Did Tadashi offer because he wants Hiro to do the same?

“Are you giving it to me so I’ll give you mine?”

Tadashi doesn’t say anything. 

Hiro wonders if his brother already knows how to get into his phone. Tadashi did have a knack for showing up at bot-fights exactly when Hiro was in trouble. But if he knew he was going, why didn’t he just stop him?

“I never want to do anything that would push you away,” Tadashi says softly. He’s speaking like he’s choosing his words carefully. 

“But if you could, you’d want me to give you my phone?” Hiro says. He feels weird about this, and it’s obvious in his tone.

“Of course. I like things planned out and having more knowledge helps,” the alpha says. “But I also know that’s not how you like to do things.”

The way Tadashi talks about it makes it all sound so reasonable. But it was messed up that he led Hiro on as NinjaFighter. Was any of that even real, or just him going with what Hiro wants? So he can keep an eye on him?

“Is this whole boyfriend thing even real? Or is it because you don’t want me to be mad at you?” Hiro asks.

He has to know.

“I-I’m not mad at you anymore. You can tell me the truth,” Hiro adds.

Tadashi can never stay mad at Hiro and Hiro can never stay mad at Tadashi either. No matter how fucked up the situation.

But his eyes sting at the thought that Tadashi is just playing along to make him happy.

“I’ll be okay!” Hiro insists, rubbing his stupid tears away. “You don’t need to treat me like a baby, I want to know how you really feel about me.”

Tadashi brushes his cheek and kisses him.

“I want you all to myself. I don’t want anyone else touching you, getting photos of you, or kissing you,” the alpha says, his voice deep with emotion.

“Is it because we lost our parents? You don’t want to lose me too?” Hiro always felt attached to Tadashi too. 

Maybe the alpha has a different way of coping.

“Maybe that’s a part of it,” Tadashi says. “But when you called me your alpha daddy...I really liked that. I want to take care of you.”

Hiro flushes. At this rate, he’s going to get a permanent blushburn on his cheeks. 

Tadashi kisses Hiro’s cheek again, holding his face in his hands.

Then the alpha runs his thumb along the omega’s cheek and rubs his plush lip with it. Hiro’s mouth parts and Tadashi slips his thumb into his mouth. 

Hiro sucks slowly on it and the alpha is looking at him with heated awe. 

Tadashi loves when his baby brother is so sweet and submissive, just to him. The feeling of the omega’s tongue on his thumb makes his cock heavy.

“You’re such a good boy Hiro,” Tadashi says huskily, pulling his thumb away.

The omega looks up shyly. Tadashi pulls him on his lap and kisses his pretty mouth. He tilts Hiro’s head back and kisses him along his neck, getting the omega ready for him. 

Tadashi is about to suck a mark with his teeth when something makes them both freeze.

The alpha’s stomach rumbles.

Hiro blinks.

The sound wakes him from the haze of kisses. Suddenly, he remembers why he came here. Tadashi needs to eat!

He moves to get off of the alpha’s lap, but Tadashi’s grip on the back of his neck and his waist hold him in place.

“Aren’t you hungry?” The omega asks.

“Yes,” Tadashi growls. He doesn’t move.

Hiro looks at him, eyes wide.

Slowly, the alpha relaxes his hold. Hiro climbs back to the seat next to him and watches his brother eat.

He’s always been focused on his own food whenever he eats with Tadashi, but now he has nothing else to do. So he stares at Tadashi’s mouth as he bites into the sweet and sour pork.

Hiro watches the alpha’s throat as he swallows, Adam’s apple bobbing. When he looks back up, Tadashi is looking at him too. With a bit of sauce on the corner of his lip.

The omega giggles. He gets a napkin and wipes Tadashi’s mouth.

The alpha puts his hand over where Hiro’s hand is on his face.

“Thanks,” he murmurs. When did Tadashi’s voice get so deep? 

Is it because they were making out? 

Hiro felt like a different person back there. Like he was daddy’s good boy. And it felt surprisingly good. He was always scared of being weak or vulnerable since he was already smaller than everyone else. 

He wanted to prove he was strong so he got into bot-fighting and parkour and winning science competitions. He still loves all those things too, but he also loved the feeling of being little in Tadashi’s arms and being taken care of.

Hiro peeks at Tadashi, who is finishing up his last bites. 

Tadashi seemed to like it too, being with Hiro in that way. He said before he liked being Hiro’s alpha daddy. 

Should they talk this out? The last time Hiro dived headfirst in his feelings he got an internet boyfriend and then discovered he wasn’t real. Now he has a boyfriend, but what does it mean?

“Why do you want to be my boyfriend?” Hiro says suddenly. “I mean other than to make sure no one else has me.”

Has him. Hiro is a person, not a thing! But it seems like an accurate way to describe the situation. Even if it does seem to bring omega rights back a century.

Tadashi has a strange expression on his face.

“I mean why do you actually like me?” Hiro clears his throat. “I want to understand this.” 

Tadashi is right about knowledge being a necessity. Hiro is a scientist and he wants to get back to the bottom of this. 

The alpha wipes his mouth and rolls the napkin into a ball. 

“Thanks for dinner Hiro,” he says. His voice is so rich snd velvety and Hiro wants to wrap himself up with that sound. 

Ah, focus! He wants to know why Tadashi actually likes him.

“I always loved you, Hiro. It’s like a seed that was always inside me. It only grew and took fruit and ripened as you got older.”

Hiro realizes Tadashi is looking at him like he’s an apple he wanted to pluck and taste. And he liked it. Is it wrong that Hiro just enjoyed being objectified? He can be smart and successful and still enjoy being adored, right?

But then Tadashi’s expression changes to something more vulnerable.

“I always liked the way you looked up to me. Even though you’re so much smarter than I was when I was your age, you still looked to me as your onii-san.”

He looks Hiro in the eye, tender and sweet.

“When you were little I felt like I had to always be strong for you to admire me,” Tadashi admits. “That’s why I liked that you didn’t know who I was as NinjaFighter. I could tell you things I didn’t feel brave enough to share out loud.”

The alpha’s voice gets softer.

“And you still loved and accepted me for them.”

Tadashi cups Hiro’s face.

“Even when you wanted space away from your big brother, you would tell NinjaFighter everything.” The alpha smiles. “I tried so hard to be perfect as Tadashi but you showed me I don’t have to be that way all the time as NinjaFighter.”

“You accept me even when I’m not strong. Or perfect. Even when I’m selfish.”

Hiro looks up, surprised. When was Tadashi ever selfish? He says this out loud.

The alpha’s eyes darken.

“When you sent me that photo.” 

Hiro’s heart pounds.

“I should have told you to stop,” Tadashi mutters. 

The alpha leans in closer. 

“But I wanted to see more.”

His eyes dart down Hiro’s neck and chest, stopping at where his nipple would be under his shirt.

“Wh-what did you plan on happening if you stayed my internet boyfriend?” Hiro stammers. “We’d just keep sending each other photos and never meet?” 

Tadashi tilts his head to Hiro’s neck and inhales his scent. 

“I have no idea.”

He pulls Hiro into a rough kiss. He could never get enough of the way that he tastes.

“I lose my mind when it comes to you-” Tadashi pulls away to take off Hiro’s jacket. “-that's why I put all my brains into Baymax.” 

The alpha’s voice is raw and heavy like Hiro’s the one who has him undone.

Tadashi snakes his hands up Hiro’s shirt and reaches for his nipple, rubbing it with the pad of his thumb. Hiro lets out a whimper that ends with a loud moan.

“Hello. I’m Baymax. I was alerted to your intimacy with the sound ahnngh.”

Hiro gasps. Did his brother just use him as a test subject?

Chapter Text

“Um what?” Hiro pushes Tadashi off of him. 

The alpha looks at him heatedly, but he backs off.

“I made a version of Baymax that includes sexual health. I forgot that he was still on.”

Hiro blinks.

“Do you both consent to sexual activities?” Baymax asks.

The omega gapes. They were just making out! But now that he thinks about it, it probably would have led to more by the way it was going.

“No,” Tadashi says slowly. “I don’t want us to rush things. Even if being spontaneous is more your style.”

Hiro stares at his brother.

“Right, as opposed to methodically planning ways to spy on your little brother.”

Tadashi winces. That came out meaner than Hiro intended.

“I still love you though.” The omega gives his brother a little kiss on the shoulder.

Baymax sprays them both with cold water.

“No means no. Set clear boundaries for intimacy.”

Hiro laughs and turns to Baymax. They might not be going all the way in a lab, but maybe he can help his workaholic brother manage his work-life balance.

“Hey Baymax, how many hours is considered a healthy amount of work?” Hiro says. “Because Tadashi was working so much on a Sunday he almost forgot to have dinner.”

Baymax scans Tadashi.

“Slight muscle tension detected in the following areas, likely from prolonged time sitting.”

On Baymax’s screen, the model human’s shoulder, lower back, and groin area lights up.

“Massage therapy recommended.”

Hiro smiles and flexes his fingers.

“You heard him! I’m going to give you some tender love and care. Baymax, got any massage tutorials?”

Tadashi raises an eyebrow. 

“Aw, you’re going to take care of me? I’d love that.”

When they were younger, Tadashi would ask him for massages when he was sore from the gym. Hiro liked helping his brother out. But then Tadashi started getting more defined and Hiro felt weirdly warm touching his brother. Especially after he presented as an omega.

He told the alpha he was tired of being his massage slave and built him a massagebot instead. It was a bit too aggressive and the alpha joked it'd be better for attacking than soothing.

That actually started Hiro’s botfighting journey, but that’s a story for another time.

“Come with me to the patient bed.” Baymax turns and walks towards another room inside the lab. 

They follow him to a white bed with enough room for Baymax to lay in. It must be made that big to fit patients of all sizes. But Tadashi has been the only guinea pig so far to treatments that the Baymax updates serve. 

“Please undress to your level of comfort,” Baymax says.

The alpha pulls his shirt off. Tadashi has always been athletic, but wow. Hiro traces the curve of his shoulders and his well-defined chest. 

“Tadashi, please lay facedown. There is massage oil on the side.”

A table opens up from the wall with a bottle of massage oil and various tools for self-administered massages.

“Cool! Baymax controls the room? It makes sense to make the whole healthcare facility a connected system!” Hiro says excitedly.

“Yep!” Tadashi smiles, enjoying Hiro’s reaction.

He gets on the bed and settles on to his stomach. 

Hiro pours some of the oil on Tadashi’s back and spreads it around, appreciating the toned muscles along his brother’s back. But it’s hard to reach all of him from the ground, so Hiro climbs on to the mattress and straddles Tadashi’s waist.

The alpha’s body feels so warm and sturdy under him. He really hopes Tadashi doesn’t feel how wet he’s gotten from earlier. 

“Human contact massages are often more satisfying than even the most precise massage machines. Especially when the massage is administered by a loved one,” Baymax explains. “What level of intimacy will this massage consist of?”

Baymax is about to list options but Tadashi interrupts.

“Don’t worry about it Baymax, I’ll take Hiro through it.”

The omega starts rubbing at Tadashi’s shoulders the way he used to. 

“Mmm harder,” Tadashi sighs. 

Hiro pushes down, feeling the tightness in Tadashi’s shoulders.

“Almost there. Just a bit harder,” the alpha murmurs.

Hiro puts more pressure into his thumbs.

“Good boy,” Tadashi groans.

His voice is so low and husky it makes Hiro breathless.

“Can you do the same thing but lower? Remember to push hard.”

The omega does as he’s told, straining a bit. This is exactly why he made the massagebot so rough, Tadashi is always asking him to press harder. Hiro brings his hands down to the alpha’s lower back, where Baymax said he had tension.

“Let me show you what I mean,” Tadashi says.

He puts a hand on Hiro’s thigh and squeezes. Hiro’s leg tingles and so does his omega hole.

“Come on, get up and I’ll do you.”

“Ah, o-okay.” Hiro nearly stumbles off, the words ‘ I’ll do you’ echoing in his head.

Now he’s kneeling on the mattress beside Tadashi, glancing back as the alpha pushes himself up. Hiro can’t help noticing how nicely defined his arms are.

“Do you want to lay down or sit?” 

Oh god, if Tadashi gets on top of him for a massage, Hiro is definitely going to get an erection. The alpha is heavier than him too. Even imagining the pressure makes him feel much too warm.

“I can just sit.” Hiro hopes his voice sounds normal.

He wonders how firm his brother’s stance of no sexual activities is. No, Hiro is stronger than this! It was his idea to give Tadashi a massage and he can’t back out now.

“Alright,” Tadashi says. “Are you going to take off your shirt?”

“Yeah.” Why is his heart beating so fast?

Hiro crosses his arms and tugs the bottom of his shirt up. In his nervousness, he almost gets stuck and fumbles a little. Tadashi chuckles and holds him by the hips. The alpha’s hands are so big and warm it sends a feverish heat through the omega’s whole body.

He hopes Tadashi can’t tell how wet he’s getting. 

The alpha guides his hips down so he’s sitting instead of kneeling. 

“Hmm, you seem a bit tense too.”

Tadashi moves his hands up, his palms gliding along up Hiro’s back to his shoulders. He’s the one who taught Hiro how to massage but Tadashi tends to like it much rougher.

Now he rubs heavy circles against Hiro’s shoulder. The omega moans loudly. 

Crap. How sensitive is he?

“Um! I uh-“

“Shhhh, it’s okay,” Tadashi murmurs. 

He lifts his hands off of Hiro’s shoulders. Then the alpha wraps his arms around Hiro from behind. The omega can feel his brother’s lips brushing against his cheek and then his ear.

“Make whatever sounds you want, I don’t mind at all.”

Hiro’s whole body is blushing, tingling from all the places Tadashi is touching him. He can feel the alpha’s breath in his ear, his arms around his waist, his chest against his back. 

The omega doesn’t realize he stopped breathing until Tadashi pulls away. Now the alpha is moving his hands down, pushing on all his pressure points. His movements are so precise and pleasurable Hiro can’t help but whimper. 

The alpha reaches down to the dimples on Hiro’s lower back.

“This is what I want you to do to me,” he says softly. 

Then he rubs the pad of his thumb and the fleshy part of his palm by the base of his spine. He pulls his hands expertly out to the side, then further down to the top of Hiro’s bum. 

“Ohhh wow that is so good,” Hiro moans, muffling a sob.  

He lifts himself up so Tadashi can get more access to his butt. The alpha moves his hands down to cup Hiro’s cheeks and rub them in circles. He spreads him out a little and Hiro’s omega hole squishes.

Hiro gasps. Tadashi pauses. 

“Um okay thanks for showing me! I’ll do you again now.”

Hiro practically jumps away and shoves the alpha back down. 

“Hiro, we can take a break if you-“

“No, I’m fine! I said I’d give you a massage and that’s what I’ll do.”

Tadashi has learned a long time ago that when Hiro gets like this, it is best not to argue. He still remembers when they’d have pillow fights and Hiro would play dirty and tackle Tadashi. Then the alpha would grab him and Hiro would get all ticklish. It was adorable even when he started kicking and laughing and crying.

Although Tadashi is bigger, taller and not even remotely ticklish, Hiro kept challenging him to tickle fights after. He’d even insist he’ll get Tadashi good. Then he’d get all pouty and teary if Tadashi refused so he went along with it.

Now Tadashi lets Hiro push him down on the mattress and massage his lower back and glutes. The omega is touching him more the way he wants now. But Tadashi is still thinking about how squishy and slicked up Hiro must have been to make a sound like that.

His cock is starting to strain against the mattress. Despite years of training his self-control, no mindfulness technique or meditation is going to get him to calm down now.

Tadashi groans as Hiro rubs harder just the way he likes.

“Can I take a picture of you ‘Dashi?” The omega’s voice is a little shy, but a little mischievous.

He glances back at Hiro, who is now rubbing lower on Tadashi’s butt. The omega gives him a teasing look.

Hm. The alpha supposes it’s only fair. 

“Sure. Just don’t get my face or any clues about where we are in the shot.”

Hiro bites his lip.

He snaps a photo of Tadashi’s back, from below his neck and his shoulder down to the cure of his back. It frames the muscles of his shoulder and arms quite well. 

Then he thought it would be funny to take another one.

Hiro gropes Tadashi’s butt hard and snaps the photo. Then he gives him a snack for good measure.

He barely has time to giggle before Tadashi moves from under him. The alpha flips him over so Hiro is against the mattress. He looks up to his brother with his mussed up hair and nice shoulders.

The omega snaps another photo of just their bodies, capturing the shape of Tadashi’s arms. He wishes he could capture the messy, heated look in Tadashi’s eyes. 

Something about this feels familiar, playfighting and teasing his brother just to get his attention. Hiro used to love being a brat when he was younger. Anything to get his brother looking at him. 

Maybe he hasn’t grown out of it after all. Because the way Tadashi is looking at him sets him on fire.

“I want another photo too,” the alpha growls.

He takes Hiro’s phone and looks down at the omega. Tadashi leans closer, watching Hiro bite his lip. He runs his thumb on the plush, pink flesh.

Hiro puts his pretty mouth around it. Tadashi snaps a photo from Hiro mouth on his thumb down to his collarbone. 

The alpha’s blood pools down. 

He drags his thumb out of Hiro’s thumb and rubs Hiro’s saliva on his nipples, pushing and pulling. The omega pants, feeling hot all over. 

Tadashi takes another shot of Hiro’s pink nub and the slender shape of his waist. He captures the omega’s hands, clenched around a clump of mattress.

Cute.

He thinks about the message Hiro sent him. The one that nearly had him palming his pants.

So can I send you pics of my naked body? Spread my omega hole for you? ;)

Now Tadashi wants to drag the omega’s pants down and nudge his thumb in his slick omega hole. It’s incredible how rapidly his willpower has deteriorated in the last fifteen minutes.

No. He’s stronger than this. The alpha pulls back. He needs a cold shower now. 

But the omega tugs on his arm, a desperate expression on his face.

“Please! I-I want you so much,” Hiro whispers breathlessly. 

Tadashi stares at Hiro’s hand holding on to him.

“This is why I stopped massaging you years ago,” the omega confesses, a blushing mess.

Tadashi just snorts, as though it was obvious and it took Hiro long enough to admit it.

“Wait, um did you already know?” Hiro peeks up at his brother.

“Mm, I wasn’t sure.” But there’s amusement in his eyes. 

“I thought there was something wrong with me!” Hiro says indignantly. “You could have told me you didn’t mind.”

Tadashi kisses him, sliding their tongues together. It feels so right, like they’re opposite sides of a magnet meant to join together.

But the alpha pulls away anyway. Hiro whines at the loss.

“I thought you’d know, based on how much I spoil you, that I’d love you no matter what,” Tadashi says kindly, stroking Hiro’s face.

“Besides, I knew you’d be embarrassed if you knew that I knew.” 

The alpha kisses him again, licking Hiro’s lips slowly, as though he wants to memorize him by taste. His hands are on Hiro’s waist now, pulling him close. 

“You haven’t been very good at keeping your secrets,” Tadashi sighs, in pretend disapproval. 

He’s kept his hands off of Hiro for so long and now the omega finally admits he wants him. How can he resist when Hiro tilts his head back so invitingly, making those sounds? 

The alpha starts kissing Hiro’s neck, enjoying all of the omega’s soft curves. The kisses are hard enough so he doesn't start squirming and giggling because he’s ticklish.

“I still remember the time I came back early from the gym and I could hear you moaning my name in your room.”

Hiro vaguely remembers that. It’s tough living with an alpha brother who smells so good. The deodorants never fully worked on Hiro. 

“Just a week ago I came home at 3 am and you were sleeping in my bed snuggling with my sweater.” 

Hiro blushes so hard he burns. He thought Tadashi was pulling an all-nighter!

“Ah, um, you never thought it was wrong?” 

Tadashi moves his mouth down to his chest, his hands rubbing circles on Hiro’s side. The omega’s waist is so soft and slender, as though he was made just for the alpha’s hands. Tadashi could pull him right on to his cock. But he can wait a little longer. 

“Why would it be wrong Hiro?” Tadashi puts his mouth on Hiro’s nipple. 

The omega bites back a moan so that Baymax won’t spray them. Or does what they’re doing now still count as the massage session? 

“Because we’re brothers,” Hiro gasps. 

The alpha swirls his tongue around the omega's nub, enjoying the wanton expression on his brother’s face. 

“So? Doesn’t that just mean we know each other that much better?”

Now Tadashi has his hands on Hiro’s bum, squeezing and rubbing circles on his cheeks.

“B-but it’s incest.” Not that it would stop Hiro now, with his body in chaos and his head a mess of hormones. 

“And why is that a problem? We’re both men and we’re not having children.”

That was true. He didn’t think of it that way.

“As long as no one knows we’ll be fine.”

Hiro nods, licking his lips. He wants another kiss and so much more.

“O-okay. So can we have sex please?” The omega asks, in case Tadashi plans on pulling away again. 

The alpha unbuttons Hiro's pants with his teeth.

“I’ll take good care of you tonight,” Tadashi says, tugging Hiro's boxers off.

Then the alpha lifts Hiro's legs up gives his omega hole a kiss.

Chapter Text

“Ahnngh,” Hiro cries, seeing stars. 

He’s tingling and twitching helplessly, pleasure shooting through him. 

Tadashi keeps kissing him there and he’s completely losing his mind. It’s like what he was feeling before was just a muted buzz. Now he is completely stunned, no, electrified.

Still Tadashi is kissing him, licking him, moving his tongue like that. Hiro moans and moans, incapable of holding back any longer.

It’s too much! His fingers never came close to what Tadashi’s velvety wet tongue is doing to him. The pleasure attacks him, over and over until his omega hole pulses and he climaxes all over his brother’s face.

His soul practically left his body in those moments, and now that he’s back, he’s utter mush.

Hiro is vaguely aware that he’s panting. And he’s still clenching the bedsheets.

He has never ever came that hard before. How did Tadasi even learn to do that? He knows he practices his massaging on Hiro and dummies before but…

Hiro doesn’t care how Tadashi learned. He feels blessed to have been graced with his talented tongue and he’s got to return the favour. 

He looks up to see Tadashi returning with a few small towels. He wipes Hiro’s slick from between his legs with one and uses the other to wipe the sweat off Hiro’s forehead.

Then the alpha goes to he bathroom. At first Hiro thought he was just cleaning his face, but the amount of time he’s spending in there indicates otherwise. The omega gets up and crouches by the door. He doesn’t hear any running water, only suspicious slapping sounds.

Hiro knocks loudly on the door.

“Tadashi! What the heck, you can’t just leave me like that.”

“Give me a moment,” Tadashi groans, sounding like pure sex.

“I thought you were going to have sex with me.” 

“Not tonight,” the alpha growls, the slapping sounds stopping. “I wouldn’t be able to hold back.”

Hiro rattles the door. What the hell?!

“Come out here and have sex with me! Please!” Hiro cries. 

“I’ll kiss you again when I’m done.” The slapping sounds are back, and faster now.

“No! I want you cock inside me!” 

Tadashi doesn't reply.

“Come out and fuck me properly or I swear I am going to find an alpha who will.”

Silence. 

Then the door opens. Tadashi didn’t even bother to put his pants back on, his erection on full display. But Hiro can’t appreciate it properly because the alpha is glaring at him, hurt and shocked.

Hiro knows how to fix this. He reaches for Tadashi’s cock but the alpha grabs his hand. Ow, that’s tight. Tadashi loosens his grip just a fraction, still strong but not enough to hurt.

He pulls Hiro back down to the bed. Then the alpha lets go, upset. Tadashi always goes quiet and stony when he’s mad, unlike Hiro who gets loud and teary.

“I’m sorry, I was just joking,” Hiro swallows.

He looks over at Tadashi, hoping his puppy dog eyes haven't stopped working.

“Our relationship is relatively new and I don’t appreciate jokes like that,” Tadashi says quietly.

“Sorry,” Hiro says. “I don’t know what I was thinking. Well, I thought you’d be jealous and come out and have sex with me.”

Tadashi turns.

“I’m not going to have sex with you while I’m angry!” 

“B-but it might be a good way to relieve the stress,” Hiro tries. 

“Now I’m turned on and sad,” the alpha grumbles. “You are not a toy for me to fuck away my stress into.” 

“Um, well is there anything else we can do to make you feel better? I mean I’m all for sucking your cock to apologize.”

Tadashi raises an eyebrow. Then he glances at Hiro’s phone.

“I’m not giving you my passcode!” Hiro crawls over and lays on Tadashi’s lap.

He wriggles his butt a bit.

“Can’t you just spank me or put your cock in me and we’ll call it even?”

Tadashi grabs Hiro’s butt, squeezing it.

“No,” he says finally. “I want to know what other alphas you’re talking to.”

Hiro faceplants on the mattress.

“There are no other alphas! Even the alpha I told you about that I had a crush on was you!” The omega’s voice is muffled by the bed. 

“Then why won’t you let me check?”

Hiro grumbles and kicks his feet. But when he turns, Tadashi still looks upset and is he pouting? Hiro never meant to make his brother sad. He supposes he wouldn't like to hear it either if Tadashi said he was going to fuck other omegas, joke or not.

“Fine, but you’re not getting my passcode.” Hiro turns over on his back and unlocks his phone.

He hands it to Tadashi. It’s not like he has anything to hide, except for how his social life seems to only consist of Tadashi’s friends and other scientists he met on Redchan.

The alpha smiles at that and ruffles Hiro’s hair.

“Good boy.”

Hiro is tempted to ask for more head pats but he doesn’t want his brother to know his weakness just yet. Tadashi would definitely use it against him to make him eat healthier and sleep earlier, even though the alpha doesn't always practice what he preaches!

Then he sees a smirk slide on Tadashi’s face.

Huh? 

“What are you looking at?”

Tadashi glances at him, a supremely satisfied look in his eyes. 

“You didn’t hide your porn folder very well,” the alpha chuckles. 

Hiro moves to get up, but Tadashi grabs the omega's cock and rubs.

“Ahn!” Hiro trembles, laying back down.

Then Tadashi keeps going, rubbing up and down, his thumb circling the head of Hiro’s cock. The omega goes weak, gasping at Tadashi’s big hand on him.

No, this isn’t fair! Hiro touches Tadashi’s cock too, rubbing him in the same way. The alpha’s breath hitches, but he keeps reading. 

“So you have a daddy kink Hiro? And you like being a good baby boy?” Tadashi teases, giving Hiro’s cock a squeeze.

“Mngh, you are a monster!” Hiro doesn’t know how Tadashi can keep his cool when the omega is touching his cock too.

“Hmm, no it seems like you enjoy being a brat. Oh I see, you like being disciplined with a little spanking. That’s why you offered.”

“Ngh-no! I wanted you to feel better!” Hiro manages to say between moans.

“I do feel a lot better now,” Tadashi says, lifting his hand from Hiro’s cock. “And I think I will fuck you tonight, since you seem to like it as rough as I want it right now.”

The alpha grabs Hiro by the back of his neck and pulls him into a bruising kiss.

“Are you sure you want this?” Tadashi asks, a warning in his voice. “When I’m done with you, you won’t be able to sit still in class tomorrow.”

Hiro nods wordlessly.

“You’ll be shifting in your seat trying to hide the lovebites I’ll leave on you. Is that what you want?”

Hiro nods again, heart beating in anticipation. 

“People are going to ask,” Tadashi says softly. “Who fucked you hard and marked you as theirs? What are you going to say?”

“Um that I have a boyfriend?”

“Mm, good boy,” Tadashi purrs, leaning into Hiro’s neck and sucking a dark mark with his teeth. “And who do you belong to?” 

“You daddy,” Hiro gasps at the delicious feeling. 

When Tadashi is done marking his neck, Hiro nuzzles into his chest. 

“Wanted you for so long,” the omega says.

Tadashi chuckles and kisses and sucks along Hiro’s chest. He wants Hiro to remember who had his mouth and hands all over him tomorrow morning when he looks in the mirror.

“Hiro, are you absolutely absolutely sure?”

The alpha rearranges Hiro so that the omega is straddling the alpha’s cock. But he waits for his answer before sinking in.

“Yes, jeez, you’re so annoying!” Hiro mouths off.

Tadashi smacks the omega’s ass and pulls him onto his cock. Hiro mouth opens, eyes wide as he takes in the feeling of being so full.

Finally! Tadashi is inside him! Hiro wriggles around experimentally. The alpha groans and thrusts up. Hiro lets out a surprised moan. 

Tadashi moves Hiro by the hips, pushing and pulling him up and down on his cock, timing it perfectly with his thrusts. 

“Ahngh ahngh ahngh ahngh!!” Hiro is getting fucked so hard, it’s rattling his brains. There’s a shock of pleasure every time the alpha fills him all the way up.

Every time Tadashi pushes his cock into Hiro, he pulls the omega down extra hard, enjoying to the wanton sounds coming out of his mouth. Hiro's expression is so cute and sexy, crying from lust...or is it pain?

“Let me know if I’m being too rough,” Tadashi whispers heatedly. He’s getting closer.

But the omega just keeps moaning so loudly, he’s almost screaming. 

“Hiro? Can you say yes or no?” The alpha slows down, ready to stop, even though he’s so so close. 

“Unghhh yes keep going!” Hiro begs, moving his hips up and down to keep up the momentum. Tadashi grins and fucks him hard again until he’s holding on for dear life. The omega never knew sex could be like a rollercoaster, riding the ups and downs again and again in exhilarating pleasure.

“I took a contraceptive,” Tadashi pants. “Can I come inside you?”

“Ahnghh yes! Ahngh!!” Hiro cries. 

He feels the alpha spurt inside him, filling him up and then gushing down his thighs. He follows right after, spasming on his brother’s cock.

Hiro is out of breath, feeling like he just died from pleasure and came back to life. But still he has a smartass comment ready for Tadashi.

“So you don't want to rush things, huh?”

Tadashi laughs and Hiro joins in, both of them breathless and fuzzy from coming. 

They take a shower together in the lab (thank god there’s a shower there) and go back to Tadashi’s place. Well, Hiro’s place too if he wants to move in.

The alpha gives him a goodnight kiss and slips a key into the omega's pocket.

~

The next day, Hiro heads to class positively glowing. He’s sore but not so much that he can’t sit still. For all his talk, Tadashi still put some aftercare cream on him so his bum would heal faster. And he doesn’t mind that his classmates see the marks on his neck.

The omega’s smile says it all. He’s not a kid anymore. 

During lunch, he goes to the washroom and snaps a photo of his hickeys for NinjaFighter. 

MegaboyBoy: Daddy look what you did to me

NinjaFighter: Aww does it hurt? I can be gentle next time.

MegabotBoy: I’m gonna mark YOU next time.

NinjaFighter: Can’t wait <3

After working on his nanobots the rest of the day, he goes back to Tadashi’s. He does plan on getting his stuff before moving in, but he definitely doesn't want Aunt Cas asking about his hickeys.

Unfortunately, Aunt Cas surprises the two of them with a visit. Hiro puts on a hoodie while Tadashi smirks all the way through dinner. The omega has to kick the alpha a few times to get the alpha’s hand off of his inner thigh.

On the bright side, Tadashi gets his comeuppance when Aunt Cas reveals her new pastry invention, pineapple cake. Baymax chooses to activate and informs Tadashi that pineapple will make his sperm sweeter if his partner wants a taste. 

The alpha quickly deactivates Baymax with an override phrase but Aunt Cas is struck. 

“You’re seeing someone? Why don’t you invite her over? Or him.”

“Yeah,” Hiro chimes in. “Invite your omega over.”

Tadashi shoots Hiro a look. 

“Only if Hiro introduces us to his internet boyfriend.”

Aunt Cas looks back and forth between the brothers. Her boys grow up so fast! She can’t wait to meet their partners. She has absolute faith that they’ll choose well. Well Tadashi definitely will. If Hiro doesn’t, Tadashi will make sure he finds someone better.

That alpha has always been so protective of his baby brother.