Archive of Our Own ^beta

Reno did not feel well. There was a heat boiling under his skin that he had never felt before. Even with Number 6’s ice cool running through his body constantly since he had bonded with the kaiju weapon, he was still overheating. His head was throbbing and this fight seemed endless, but he never felt more energized.

He had been on edge for days now, snipping at anyone who gave him the wrong look. Even Kafka - which earned him a sad puppy dog look and 10 laps from the vice captain. The laps would have normally drained him of any energy, but even that night, he was bouncing off the walls after.

Iharu was fed up with him. Kikoru called him annoying and slammed her door in his face. Kafka was busy with the captain and vice captain. So, he was left alone and pent up and annoyed.

That was until he got called to fight with the First Division.

With the fight, he finally was able to let out at least some of that energy. He fought with everything he could, the heat still burning deep within him.

Logically, he knew he should have gone to medical the second he knew something felt off. This heat was not normal, this adrenaline rush was not normal. Especially not for him. He had always been the level headed one, the one that was more logical and reasonable. But now, he was running on base instincts.

If he wasn’t a beta, he’d be convinced that he was about to start a rut.

“Officer Ichikawa, you need to pull out!” The First Division officer monitoring his stats yelled in his ear. “You’re overheating.”

“I’m fine,” he snapped back, a slight growl in his voice. “No need for me to stop fighting.”

He had too much energy to stop fighting now. If he pulled out, he would be just pent up and angry, but this time at the First Division base. He couldn’t not fight.

“Ichikawa, that’s an order. Pull out.” The voice of Gen interrupted the fussing from the other First Division officer. “You’re being reckless. Get out before you hurt all of us.”

He was using his stupid alpha voice. The one he used to boss the others around. He always tried to use it on Reno and it never worked. Those voices never worked on betas - that was just a common fact. Except now, he felt the need to submit to the powerful alpha.

Gen Narumi was an annoying alpha, but nobody would deny that he was a powerful alpha. Powerful to the point that even Kafka submitted to him without question. It aggravated Reno to his core. And yet - he submitted. There was something about his voice this time around, something that triggered something.

The rage that was building under his skin was starting to settle low into his stomach and he still wasn’t exactly sure why he was acting like this.

The smell of rut was thick in the air. So much so Gen could taste how it tangled in the air. He couldn’t tell who it was though.

He waltzed the halls, following the scent, the high of the previous battle running through his body still. It had been a good fight, giving Gen that high that he usually craved. This, however, just added to high.

It couldn’t have been Kafka - the only other alpha that he was aware of. If it was Kafka, he would have already been decapitated by the bitch of the omega that was Soshiro Hoshina for even scenting the air and getting too close. Seriously - he was always so mean and would gladly kill if it meant Kafka’s attention was on him.

He wasn’t dead yet and the air lacked the coffee smell that Gen had always associated with the much friendlier alpha. No - this scent was cold. It felt like ice against his mouth. The strong smell of peppermint hit him like a truck. He knew this scent - he knew it well.

Reno Ichikawa. The Ice Prince. Number 6’s deadliest weapon.

On paper, Reno was a beta. He remembered the records clearly.

But no beta smelled this strong. No - this was an alpha in rut.

He followed the intoxicating scent to the locker room. He felt like he was high - which had never happened to him outside of the one time he caught an omega in his division in the middle of their heat. The difference here was he felt the intoxicating pull of an alpha. Unlike with the omega, he wanted to find Reno. He wanted to find Reno and confront him.

The rational part of his brain was saying that he needed to find Reno and scold him for being so inconsiderate of his colleagues and forgetting his suppressants. Something, something, it was his duty as an officer to be responsible and he was being irresponsible by not tracking his rut.

But there was another part of him that screamed when he saw the lithe body of the alpha still standing in the shower, water cascading around him, and his hand around his cock. The part of him that won his quick internal battle wanted to savage Reno, treat him like he would nay omega, finally putting him in his place where he belonged.

He couldn’t tear his eyes away as Reno still jerked himself off, as silent as ever. The peppermint smell was getting stronger, making Gen feel like he was drunk. He could feel his own cock finally getting the memo that he was going to probably fuck Reno.

“Officer Ichikawa,” he snapped at the younger man. “What? You couldn’t wait until you got to your dorm to be indecent?”

Reno glared at him, a harshness in his eyes that Gen only associated with rut. He looked feral.

It was hot.

Reno bared his fangs, trying to one up the alpha in front of him, but Gen wouldn’t back down. The steam of the shower helped spread the intoxicating peppermint smell. He was having a hard time telling if the heat that was slowly rising from the room was from Reno’s shower or if it was just the heat that Gen could feel rising in his stomach.

Reno was challenging him. He was being challenged.

Gen Narumi was regarded as the strongest alpha in the Japan Anti Kaiju Defense Force. He was the strongest all around in every single sense of the word. So nobody in their right mind ever challenged. It was thrilling.

Reno snarled at him, baring his fangs. Gen could feel the anger in the air, mixing with the distinct smell of sex and sweat. The high he had felt earlier was still running through his veins and everything about this situation was fueling the fire in him.

This was a challenge he wouldn’t back down from. If it had been anyone other than Reno, he would have turned his back and left with a huff.

But this was Reno. Ever perceptive Reno who never lost his cool or showed any other emotion other than calculated indifference. Reno who would never ever bear his fangs at anyone of higher rank than him. Reno who always stood by what he believed.

They barely knew each other, but after fighting with Reno by his side, he understood what Kafka had been on about. Reno was special. Reno actually cared about him and all the other officers he fought with. Reno was a diamond in the rough in the JAKDF and the moment Gen met him, he knew his life had changed for the better.

Maybe he was letting the smell of Reno’s rut get to his head. With a shake of his head, he tried to clear his thoughts.

He still had to deal with the mess in front of him. The mess of a very pissed off alpha at the start of what Gen could only assume was a first rut. He couldn’t tell if this would end up being a fuck or a fight. Or both. Both were good.

“Come on then Reno,” he said with a small laugh in his voice. “If you’re gonna try to act like a big tough alpha, then play the part properly.”

Reno could barely think. The heat was getting to his head. His only thought was that Gen looked desirable for once.

He had mixed feelings about the First Division leader. Kafka had vouched for him, calling him an annoying bastard that was too cocky for his own good, but when it came down to it, he would do anything for his division. Reno had found that to be true, but there was something pulling him to the captain.

He tried to deny the best he could, but he did find Gen attractive. He was confident in ways Reno only hoped he could be. His power carried purpose. He knew he was the strongest and he had earned that title fair and square. It was attractive as much as it was annoying.

But staring at him now, with his command still hanging in the air, he wanted to challenge him. He wanted to grab him and force him to submit to him.

He had never had thoughts like this before, in any sense. He had always been completely in control of his urges - sexual or otherwise.

The heat felt suffocating. It felt like it drowned every single thought that wasn’t sex or fighting. All this energy was still resting under his skin. He just wanted to find someone to mount and use them until his brain cleared of whatever madness had clearly taken over him.

“You’re just all talk huh?” Gen teased, giving him a wicked smile.

Reno couldn’t help but stare as Gen took off his jacket finally. The skin tight shirt he wore was straining against his chest and he couldn’t stop himself from staring at the way his arms looked. He wondered if Gen would be willing to choke him.

“You come off like you wanna be such a big tough guy and yet you can’t even challenge me properly.” He could hear the eyeroll.

“Oh fuck off,” Reno managed to growl out, his annoyance for Gen outweighing his thoughts of having him choke him out.

“Not so far gone you can still talk huh?” Gen snorts. “But still pathetic enough to jerk off in the common showers.”

Gen had to be acting like this on purpose. There was no way nobody was this annoying and not aware of the way they acted.

“You’re annoying enough that it’s all I can think about.” Reno tried to sound angry, but if he really thought about it, he wasn’t mad that Gen was here now.

For a while, all he could smell was an overwhelming peppermint scent. Something that he only associated with Number 6 until this point. But ever since Gen came in, that peppermint smell was taken over by a strong smell of bitters. Something that was distinctly Gen in so many ways. How had Reno never noticed before? Why was it so attractive to him? Why was Gen so suddenly attractive?

He leaned back against the cool shower tiles, closing his eyes and hoping this was just the heat getting to him. He tried to think logically about everything that had happened. The heat, the irritability, the pent up feeling.

“I can see you thinking, Reno.” Gen laughed slightly. “Are you just now figuring it out?”

“Figuring what out?” He managed to bite out, not even opening his eyes to look at Gen, still trying to focus on cooling down.

“Why don’t you look at me when I tell you?”

Reno tried to ignore him, but there was that temptation. A temptation that Reno struggled with. He needed to figure this out, figure out whatever Gen was holding over his head. But the idea of seeing Gen right in front of him, in that skin tight shirt and strong arms that could make Reno feel so good. And so he caved, opening his eyes slowly, only to be greeted by a heavenly sight.

Gen felt powerful with the way that Reno looked when he finally opened his eyes. He relished in the way Reno’s eyes raked over his body, taking in every inch of his skin. Between the time that Reno had closed his eyes, he had stripped out of what little clothing he had on, trying to make his message to Reno clear without words.

Half of the fun of this was the thrill of the chase, but he also could no longer deny how much he wanted Reno. How much he wanted to make him his.

“You’re in rut, princess.” He gave him a sickeningly sweet smile, laughing a bit as it seemed the pieces all started to click in Reno’s head. “And here I was thinking you were a beta and average just like everyone else. Yet, you’ve proven to be extraordinary once again.”

“I am a beta though.” The comment was more of a whimper from Reno. “I don’t get ruts.”

“You say that, and everything about this says otherwise.” Gen shrugged. “Say the word and I’m gone. If you don’t want this, say it now and I’ll go. We won’t speak of this and I won’t tell anyone and that will be it.”

“Stay.” Reno bit out, hand moving back to his cock. Gen didn’t bother to hide the fact that he was watching this time around. “Please. Fuck.”

Reno was never the one to curse, but the way his voice broke sent a chill down Gen’s spine. He was going to have fun with this.

“Can you pull yourself together long enough to get to my room or should I just fuck you here to prove a point?” He was cold with his words, like it was an everyday occurrence for him. It was mostly for show, but he didn’t miss how Reno shuddered slightly at the words. He couldn’t let Reno know much this was affecting him. It would ruin the little game they had going on.

“Whatever you want,” he whimpered.

Gen could see how desperate he was in the way that he moved his hand around his cock. The desperation was noticeable in the way that his hips bucked forward, chasing any pleasure that he could get. It was almost mindless, Gen doubted he actually knew that he was doing that.

It was pathetic and desperately hot.

“Stop moving your hand then.” Gen gave him a look, his command clear. “Behave.”

Reno shuddered and with a slight sob, he removed his hand. Submission was not natural for an alpha - everyone knew that, but it did look beautiful on someone like Reno. The way he so easily submitted, even if it was against his nature, gave Gen a thrill that he had not had in a while. This was different from him listening to orders in a battlefield. This was him giving control over to Gen completely.

“Good boy. You always behaved so nicely.” He finally moved over to Reno, pulling him closer by the nape of his neck and kissing him.

He tasted sweet, the taste of peppermint was strong in his mouth but he savored the taste. He savored the way that Reno grabbed at his waist and pulled him closer, rutting his hips desperately against him.

Gen pulled away from the kiss, pulling at Reno’s hair, making the other man whimper. “Be good if you want to actually cum tonight,” he hissed before moving to kiss down his neck.

Reno was a marvel of a man. His skin was unscarred and untainted by their profession. Gen wondered how he would look covered in bite marks and bruises. He wondered if Reno would whimper and beg for more, if he would beg for his bite. He was desperate for more.

“Captain, please,” Reno whimpered. “Please don’t stall. I can’t take it.”

Gen normally hated when people used his rank when he was sleeping with them, but there was that desperation again that Gen craved.

“Don’t call me captain when I’m going to suck your dick, Officer.” He rolled his eyes as he lowered himself to his knees, putting himself eye level with Reno’s dick.

There were many things Gen considered himself good at. Video games. Dismantling kaiju. Being the best all around. But he had been told that he was fantastic at sucking cock.

He kissed at the head of Reno’s cock, locking eyes with him as he bit back a moan. That feral look in his eyes that had been there since Gen had started talking was slowly getting more intense, his rut finally starting to really sink in.

He started to slowly trail his kisses down Reno’s cock, toward his knot that was already starting to form. He was already twitching and leaking pre-cum. Every kiss that Gen gave left him moaning and twitching for more. He reveled in how much control he still carried in this situation.

Reno’s eyes nearly rolled back into his head when he finally took the head of his cock into his mouth. Gen had truly missed the feeling of sucking a nice dick.

He had been in this position many times, enough to know what makes a good cock and Reno had a beautiful cock. It felt deliciously heavy in his mouth, his pre-cum tasting sweet with that salty tang that he always enjoyed. He rolled his tongue over every vein, enjoying the way Reno attempted to not rock his hips into his mouth. He didn’t want to take his eyes off him.

He slowly pulled off, relishing in the way that Reno was whimpering with the loss of contact. “You can fuck my face if you want,” Gen said, giving him a knowing look.

Reno nodded, shyly grabbing at his hair and letting him kiss at his cock again.

Reno had never had this done to him before. He wasn’t a virgin. He had had sex before, but only once with a girl in his high school. It was nothing compared to this.

The way that Gen had so easily gotten onto his knees for him had made him dizzy. His mouth felt perfect, warm and soft. He couldn’t help but to roll his hips into the tight heat that was Gen’s mouth.

Something inside of him seemed so satisfied with the feeling. It was a primal feeling, something inside of him telling him to grab Gen’s hair and fuck his mouth properly, knot his mouth and make him take it like a good omega would.

But that was not the game that they were playing. Reno knew that he would be putty in his hands the second he started bossing him around on the battlefield, but this version of Gen was a completely different beast. He had control over every part of this situation. It didn’t matter that Reno was fucking his mouth like his life depended on it, Gen at any moment could stop him and leave him here desperate again.

Reno just had to hope that he wouldn’t.

He could feel himself grow closer and closer to cumming. The heat that had been clouding his mind finally fully taking over his mind as he was about to cum.

But that high never came as Gen denied him the pleasure.

“No,” he whimpered as Gen wrapped his hand around the base of his cock and slowly stopped sucking his cock. “Please Captain, I need it. I need it so bad.”

“I never said you were going to cum from this.” Gen gave him a smile that sent shivers down his spine. “Face the wall. Bend over.”

Reno struggled to obey his command, but the tone of his voice left no room for questioning. He wanted to take more, force Gen to please him properly, but he knew his place. With another whimper, he followed what he had been instructed to do.

The tile felt like ice against his skin. Not like the dry ice feeling he got from Number 6. It was a pleasant chill that made him arch his back unintentionally, leaning against the tile. It tentatively cleared the fog in his head and let Reno begin to process what exactly had been happening.

He had just fucked his captain’s face during a rut - his first rut too. A rut that he was not supposed to have because he was supposed to be a beta. But Gen had taken it with stride, simply getting on his knees on a dirty shower floor and giving Reno a blowjob that made him rethink every sexual experience that he had ever had in his life.

A slap to his ass drew him out of his thoughts. He hadn’t really been paying attention to what the other man had been doing, lost in his thoughts.

“You present so beautifully.” Gen’s voice was barely above a growl. The smell of gunsmoke was heavier than the peppermint smell that had been there before. It weighed down the air and it made Reno dizzy.

The power that Gen carried was obvious in his scent alone. Who was he to challenge the strongest?

Gen watched with glee, enraptured with the scene before him. Reno submitted so beautifully. The cold calculated Reno was something gorgeous when he was begging for a simple thing as release.

The way his back arched was gorgeous. He presented just like Gen expected an omega to, without question and without backtalk. He always appreciated when his partners didn’t question him, even though he was used to the occasional back talk from a certain omega that was fond of attempting to kill him during sex. But this was something different entirely.

He had slept with other alphas before. It wasn’t unusual for him. Especially when someone tried to challenge for his place. But Reno was different from a natural born alpha. The curves of his body were a lot softer, his attitude was kinder, he was a gem. Gen found that admirable. He hadn’t let the JAKDF get to him.

Maybe Gen needed to reevaluate why he felt this way for Reno, but now was not the time to think about that. Not when he had Reno’s perfect ass right in front of him.

He reveled in the sound that Reno made when he grabbed it, not bothering to be gentle.

“Do you touch yourself here Officer?” He asked. “Or does that boytoy of yours please you?”

“What boytoy,” Reno squeaked as Gen slapped his ass.

“Pink hair. Stupid around you.” Gen rolled his eyes, leaning back slightly to use the cooling shower water to coat his fingers. It wasn’t lube, but it would work for now. “You can do so much better than that.”

“Iharu? He means noth-” Reno’s sentence was cut off by a loud moan when he finally ran a finger over his tight hole. “Oh fuck Captain.” He let out another moan when Gen finally shoved a finger in him.

“Don’t use his name when I’m the one fingering you open.” He made no attempt to hide the jealousy in his voice. He wasn’t even aware of why he was jealous. It wasn’t like Reno was mated or anything. He could have close guy friends, just as long as Gen was the one bending him over at the end of the day and making him moan like he was now.

His moans sounded heavenly bouncing off the tile walls. He was so tight, it was heavenly to him. How could one man be so perfect? The way he panted as Gen worked another finger in and as he finally leaned down to kiss around his mating gland. The peppermint smell that was so uniquely Reno brought back that high Gen had been feeling when he first walked in.

He needed to fuck him soon, least the rut get to both of their heads.

“I’m going to fuck you now.” He left no room for questions, kissing at Reno’s neck, his voice barely above a whisper. “I’m gonna fuck you and maybe knot you. Who knows? But you’re gonna take it and be good.”

Reno yelped at Gen’s comment and as he removed his fingers.

“Last chance Reno,” he leaned now, placing another kiss on the back of his neck. “If you don’t want this, tell me now.”

“If you don’t fuck me,” Reno snarled out. “If you don’t fuck me within the next five minutes, I will go to Iharu and maybe he’ll actually make me feel good.” That peppermint smell was back, downing Gen’s senses. The smell of Reno’s rut.

Gen was nothing if not a jealous man and the idea of Reno going to anyone else right now finally made him snap. Two fingers was not enough prep, but it would have to do.

He didn’t realize how hard he had become. Reno was turning him to putty in his hands, ruining him for everyone else that would come after. Every choked breath and groan only fueled Gen on. There was nobody like Reno and Gen was surprised that it took him this long to realize that.

It felt like Reno was being carved for his body with every thrust. He was tight and warm and perfectly molded to him.

“Am I the first one to do this to you?” Gen growled on one particularly rough thrust, mouthing at Reno’s neck around his mating gland. “Am I the first one to make you feel this good?”

Reno’s only response was another high pitched moan, clenching around Gen’s cock in a delightful way. This had to be heaven on Earth. He had to have died because there was no way that someone like him was allowed to be fucking someone like this.

Their bodies were perfectly in sync. Every thrust was met with a whine that echoed off the walls. Gen didn’t even care if anyone came to shower at this moment. They would be dead before anyone could see Reno like this. Nobody would ever see his Reno like this again.

“Please, please Captain.” Reno’s voice was shaking as he begged. “Please, please, let me cum. I’ve been so good. I’m so close - please.”

There was no way that one person could sound so beautiful and not be an angel sent to Gen specifically.

“Keep singing my praises baby,” he purred. “You sound so beautiful.”

The more Reno whined and begged for any form of release, the harder Gen fucked into him. It would be a damn shame that he wouldn’t be able to knot him, but there would be another time for that. There would have to be.

He wrapped his hand around Reno’s neglected cock, rubbing harshly against his knot and squeezing gently. Anything to get more of those sounds out of Reno.

“Cum for me Reno,” he mumbled, placing a kiss on Reno’s mating gland, finally causing the younger man to scream as he finally came.

Gen followed soon after, a cry for Reno on his lips. He held Reno through the aftershocks of his orgasm, still kissing and gnawing at the skin of his shoulder. He wouldn’t bite him. No - if he ever did that to Reno, he would want him to remember this.

He felt Reno’s knees finally gave out. The rush of hormones as it leaves him making it harder for him to stand. Gen remembers how that felt the first time.

Maybe he’d bring Reno back to his room. At least there it was more private than the officer dorms would be. That was actually a smart idea.

Reno was quite frankly exhausted. The foggy feeling had finally left his head as he slowly came to. The last fully conscious memory he had was Gen bending him over in the shower. His body ached, but in a decidedly pleasant way.

He had fucked the First Division Captain. That much was obvious to him. But that didn’t explain where he was or what happened.

His best guess was that Number 6 had changed his secondary gender. That had felt like what he had learned a rut should feel like. Harsh, slightly painful, full of hormones and the smell of sex. But that wasn’t what he expected for his first time.

The captain hadn’t been gentle, not in the slightest. However, he still made Reno feel good. He treated him kindly and fucked him throughly. He didn’t bite him and abandon him. He had been shaking and begging for more and more and more. And Gen gave it to him willingly.

That didn’t take away from the fact that he had fucked the First Division Captain in the public showers. He would have to drop out of the Defense Force at this point, there would be no way that he could ever show his face here ever again. No sane person would have done that. No sane person should have loved that feeling of being exposed like that. They had been so lucky that nobody had walked in or overheard them.

How did Gen feel about that? He never really seemed to care too much about his reputation in the first place, but he could have destroyed everything he built if someone had walked in on Reno making him do that to him.

Yeah, he was definitely dropping out of the Defense Force. Goodbye childhood dream - you died in a passionate afternoon in the showers with a man that was his superior.

“Oh you’re up.” Gen’s voice broke through his thoughts. Why was Gen in his room? Did Gen bring him back? “You passed out immediately after and I got worried.”

“Why are you in my room?” Reno mumbled, finally sitting up, looking everywhere around the room but at Gen.

“Your room? Please.” The laugh was evident in Gen’s tone. “This is my room. I brought you back. There was no way that I was going to let you go back to that dorm smelling like sex and me.”

Reno truly thought he was going to die here. Purely from embarrassment or shock. There was no way.

“You should see the look on your face.” Gen was laughing at him. Maybe he could convince Kafka to take him out in his kaiju form? He could be ripped to shreds and that would be less painful than the fact that Gen was laughing at him. “It’s completely chill. You can stay here as long as you need to rest up and feel better. I wasn’t exactly kind to you.”

“You don’t mind?” Reno gave him a suspicious look.

It was like looking at the Captain through new eyes. Gen was casually pressed against the door frame, sweatpants hanging low on his hips and a compression shirt that showed off every single muscle that he had. Reno couldn’t help but stare and admire.

“Not one bit. Plus ruts typically last three days. So - you’re in for a wild ride.”

“Oh fuck,” Reno said, not even trying to hide his shock at the sudden realization.

Reno truly felt like he was going to die from embarrassment as Gen laughed again.