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English
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Published:
2025-06-10
Updated:
2025-06-10
Words:
2,390
Chapters:
2/?
Comments:
42
Kudos:
204
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23
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1,716

Death by Double Black

Summary:

All might getting killed by Double Black and sends the world into a mass shock

Notes:

(See the end of the work for notes.)

Chapter 1

Chapter Text

“HI EVERYONE!” a voice exclaims through the screen. “Hey, you're too close, you damn fish. You need to back up.” “Chibiiiiii~ why so mean!?” The voice retorts as it gets quieter.

“Okay, okay. I'm trying again.” A simple hum responds to the other voice.

“Hi everyone! For today's video, we will be doing: How to kill the number one hero in five easy steps! A true 'do it yourself’ kind of video!”

The figures remain not visible to the camera, yet they're voices are clearly heard.

“I think you're going to need to do a voiceover or something.” “Oh no! You really think so~” “QUIT MOCKING ME, YOU STUPID MACKEREL!”

“Quit yelling… Okay! Step one…”

 

~

When Izuku gets home from school, he goes to his favorite video watching platform expecting to see some All Might edits, maybe a summary or two of his hero career…

What Izuku does not expect to see is a video titled ‘How to kill the number one hero in 5 easy steps!’ A video from an account named ‘mackerelandchibiiii120847’. He'd never heard of the account…

Whatever this video was, it was obviously fake. However… Their view count was skyrocketing. It had been up for less than twenty minutes and it already had over one hundred thousand views…

He clicked on the video.

Unaware of what was to come…

 

~

“Step one… isolate him in an unknown location! Bonus points if you write a note telling him a bunch of kids are in danger!” “You bastard! Did you really-” “Chibiiiii~ I'm in the middle of saying the steps!” “QUIT CALLING ME THAT!” “I WILL IF YOU GET TALLER!”

“Ignore that! Okay…” Dazai turns the camera to show a confused All Might looking around, in an abandoned looking warehouse. “As you all can see, step one has been completed! Step two is to trick him!” Dazai exclaims, letting out a chuckle.

“Hey, chibi! You need to film this part!” “I think it'll be fine if we just prop it up…” “WOW! Who knew a dog could be this smart?!” “SHUT UP, YOU ASSHOLE!”

For the first time in the video, their faces become visible. The taunting boy is revealed to be a boy who looks to be around fourteen, with brown, messy hair and a lot of bandages…

The other boy is attempting to prop up the camera. “Whatever, this'll be fine for now.” He has blue eyes, ginger hair and does in fact seem to be significantly shorter than the first boy. Most likely they were the same age too.

As they leave the camera, you can see the brunette sprinting towards All Might, with distress written all over his face. “Hey! Are you alright, young one?” Through gasps, the boy exclaims “No! I'm being chased please you have to help me!”

For a split second, if you zoom in enough, it appears that he looks at the camera and winks.

“Who's chasing you? Is it a villain?!” “Yes! They're trying to k-kill me!”

At that same moment, the ginger boy walks in. “Hey… Come out, come out wherever you are! You can't hide forever…” Dazai gasps.

“Don't worry, boy! I'll protect you!” In response, he hides behind All might, gripping his hands around his waist.

“What are yo-” he begins as a lunging Chuuya jumps at him. The clear realization of being in his weaker form hits him almost as hard as Chuuya's punch. Dazai lets out a small giggle, before All Might collapses, unconscious, on the ground.

“Grab the camera, it's too far for me to talk!” The bandaged boy orders the other. “Why would I do that!?” “Because you're supposed to be a loyal dog! Isn't that right, chibi~” “Whatever, you asshole!” Whilst saying that, he throws the camera at the brunette head, stopping it inches away from smashing into him. “You're so mean! You're making me want to go and die!” “You would've tried to anyway, you suicidal maniac!” The ginger shouts back at him.

Dazai takes the camera. “Step three… well that was attacking him… I don't feel like voice overing it, so pretend I already said it!” A few seconds of silence pass. “As you can see, here's All Might.” He's sitting beside him, his hand in control with All Might. “Step four and five are pretty much the same.” The other boy scoffs loudly. Ignoring him, the bandaged boy continues. “Step four was to win and step five was to kill him! As you can see, we've won so now we kill him!”

“Now we are going to be doing this… with a gun!” He exclaims while swiftly pulling out a firearm from under his black coat.

He aims. He fires. Two shots in his head.

“Normally, I'd just do one but he's the ‘supposed’ number one hero, so… You never know!”

“Hey.” “Hmm? What's up?” The brunette turns to the ginger who has now decided to speak up.

“Just what the hell was that acting?!” The ginger spits out before bursting out laughing. “I can't believe he fell for that!” “Oh shut it, chibi! You can't be talking!”

Soon they were both laughing their faces off.

The video ends.

~ 

Izuku watched the video to the end. His eyes wide and filled with tears. He looked to the comments, for some reassurance.

He found only the truth.

All Might was dead. All Might was killed. Killed by two boys who looked to be around his age too!

He sprints out of his room and goes to hug his mom. She, of course, had no idea what was going on so she turned on the tv.

“IS ALL MIGHT TRULY DEAD? IS THIS VIDEO THE TRUTH OR IS THIS ONE HORRIBLE HOAX!? STAY TUNED TO FIND OUT!”

Izuku had never heard his mother gasp like that. It was practically the sound of a dying animal. He never wanted to hear that again. Chills run down his back as reality sinks in.

All Might really was… dead.

 ~

Pro heroes all around Japan were shocked by this news. The hero commission held a meeting almost immediately after the video aired.

The president walks into the room. “Hello everyone. As you all know, we are not here for good reason.” Murmurs run through the table of heroes. Finally, she speaks again. “All Might is in fact… dead.” Gasps, cries and screams explode throughout the room.

“Settle down!” She exclaims as the voices begin to quiet out. “Research shows that the two boys are Yokohama citizens…” Silence ensues. “They appear to be young too, most likely around the age of fifteen.” Whatever silence was there, is now very gone. ‘How could these children be murderers?!’ ‘They're monsters!’ ‘They're so young!’

She sighs, standing up. All eyes look up to her. “We will need to catch them and put them on trial. As much as I hate to say it, they may just be troubled teenagers. They do live in Yokohama after all…” Everyone knew of Yokohama, the infamous city of crime, run by the port mafia. They had many dangerous villains there, such as; the demon prodigy and double black. None of these heroes had ever seen that man or that duo.

Yokohama was free for anyone. The port mafia did not care who came in and out, so long as they stayed out of their way. If heroes got in their business; they were killed, if villains got in their business; they were killed. There are no exceptions for them. Heroes, villains and citizens choose not to go there, for the sake of their own safety.

Those who did go, usually ended up dead.

The president spoke up, “We will catch them. Let's begin the search tonight.”

Chapter 2

Summary:

Aizawa and Yamada talk a bit, Mori yaps, Dazai makes a plan, a flower stand operator is traumatized and Aizawa is questioning his choices!!

Notes:

(See the end of the chapter for notes.)

Chapter Text

The heroes were in an uproar.

"Tonight?! That's impossible! It's already almost eight!"

The president paused for a few minutes before standing up and speaking. "Give all the students a week off. During that time, we will begin the operation to take the boys."

~

After the meeting concluded, the heroes all went back to their homes. Aizawa walked next to his husband Hizashi Yamada, also known as Present Mic.

"I-I just don't understand how two children, CHILDREN (iiii), could be the ones who murdered All Might..." Yamada muttered, just loud enough for Aizawa to hear.

"Hizashi... I understand what you're saying. It's hard to believe that two boys who look to be around our students' age, could kill the number one hero, and post it in a 'how to' video too... But we need to face the truth. Whether we like it or not, whether they are troubled or not, they did kill a hero. A really good one at that."

"B-but they're j-just kids..!" Yamada cries out, through a muffled sob.

"Well... Maybe they really are just, troubled. We won't know until we meet them..."

The rest of their walk home was met with silence.

 

~

 

Chuuya and Dazai walked into their boss's office. Mori welcomed them with a smile plastered on his face.

“Chuuya! Dazai! You're just in time!”

After a few moments of silence, one of them finally speaks up.

“What did you call us here for Mori?” Dazai questions harshly. He's never been much of a fan of Mori, Chuuya could guess why, he was the Port Mafia boss after all.

“Ah, Dazai… Straight to the point as always, I see!”

Chuuya stared at him intently, awaiting their new order. Dazai however, had to hold back the urge to roll his eyes and let out an exasperated sigh.

“As I'm sure you know, Dazai,” Chuuya quietly turns to him. What had this bastard been hiding from him this time? “The heroes will come for you. I want you to let them catch you.”

Chuuya felt his mouth fall open.

“They will believe you are just troubled children who grew up in an oh-so-terrible environment. After you convince them how ‘messed up’ you are, I want you to secure a place in UA. As a student, of course.”

What the hell. Chuuya's mouth was wide open and he didn't even have the right to protest.

“Yes, Mori.” Dazai said, as he turned to walk out, grabbing Chuuya and pulling him with him.

“Hey-” Chuuya began to protest but was cut off by Dazai's hand covering his mouth the second they left the room.

“Come to my apartment.” Dazai whispered in his ear.

He was awfully close, Chuuya noticed.

 

~

 

The walk to the apartment was silent, only did they begin talking once they arrived inside.

“Dazai. This is my apartment!”

“Whatever,” said Dazai, rolling his eyes. “I'm here just as much as you are.”

Chuuya couldn't even protest, since the statement was entirely true. Dazai barely ever went back to his apartment and if he did, it would only be to attempt to end his life.

“Do you want something to eat?” Chuuya tried asking, hoping he'd say yes. He knew Dazai hadn't eaten in days and when he did eat, he would only eat it if Chuuya made it.

“Mmmmm… I'm good! Not too hungry, you know?” Chuuya didn't understand why he was trying to justify it, he barely ate anyway.

“Hey, Chuuuuuuyaaaaa~” “WHAT.” “I have a really good idea for how we should get captured!”

Chuuya turned, he knew that look on his face… He was planning something, something mischievous…

 

~

 

It had been three days since the death of All Might and four days until the UA students would be back in school.

Aizawa and three other heroes stood at the entrance to the city of Yokohama. The plan was to go in small groups, every few days to try and catch the boys.

Aizawa somehow, ended up in the first group, with Midnight, Vlad King and Present Mic.

They walked in. The city seemed… oddly normal. They had all expected a city filled with blood and guns down to every nook and cranny, however they were met with a calm city… With very few civilians out?

Aizawa turned to try to see more people, however, there were none in sight. Except a man running a flower stand, looking around as if he was expecting someone.

 

~

 

As Dazai told Chuuya his plan, he had to hold back a laugh as he looked at his shocked face.

“You want to send all the heroes on a chase after us? Then just let them catch us?” Chuuya sighed, trying to seem annoyed, but he couldn't help the smirk forming on his face.

As much as he hated to admit it, Dazai's plans were actually pretty fun, when he informed him of them (which barely ever happened).

 

~

 

Dazai marched forward, onto the busy sidewalk. One look at him and everyone was gone. Apart from a flower stand, who's owner seemed to be inside when they came out. Poor guy, Chuuya thought to himself.

“Hello sir!” Dazai exclaimed enthusiastically, walking up to the stand.

“Oh why hel-” Chuuya could practically see the life drain out of the poor man's face as he realized who he was talking to. Two of the most infamous Port Mafia executives, the duo, Double Black.

“Now we have just an itty-bitty favor to ask of you… do you think you could do that for us?” The man nodded his head so fast, Chuuya was pretty sure he might've broken his neck, had he swung it back and forth any faster. “Just give this letter to some heroes that come, you'll know when you see them. Oh and don't mention who we are.” The man shakily took the letter and two were off.

 

~

 

Aizawa wondered why the man was smiling so widely at him, so he walked over.

“Do you need help with anything, sir?” He questioned, eyes narrowing. The other heroes had followed close behind him, unsure of what was happening.

“O-oh… u-uhm, they told me to give this to you.” The man shakily said while pulling out an envelope from his pocket.

Aizawa wondered who he was talking about and why he was so shaken in fear, but he felt no need to question him further. He took the letter and walked away.

He opened it with the others peering over his shoulders.

It read:

~

Hiiiiiii!!!!!!!!

Come back tomorrow and catch us if you can!

Sincerely,

The killers of all might :p’

~

Aizawa felt his jaw drop.

Just who were these boys?

Notes:

Thank you for all the support!!

I didn't think anyone would find this at all, let alone it get over 50 kudos...

Anywho, um this hurt to write i hate this chapter quite a lot!! But at least its something (i should be doing my homework)

Ill probably be writing a lot more when summer comes but thats in a few weeks for me soooo...

Also please remember to comment, it actually makes my day when i see that people have left comments, i reply to all of them too!

Notes:

This sucks so bad i actually cant. Uh im worried this is too similar to when we're together (im not afraid of my tears), its lowk my inspo i guess. Its one of my fav crossover fic and i LOVE crossover fics (especially mhaxbsd) i want to write a good fic which stsrts off eith a pro dead but it just feels to close so idk if ill continue this...

I might. Idk