Chapter Text
It’s not exactly a secret Bakugou “respects” Red Riot. He’s never actually talked to the guy outside of the occasional team up, but fuck he’s smitten.
He always avoided any talk about mating. He couldn’t imagine himself with an /omega/. Someone weak, frail, breakable. He just couldn’t do it.
But he’d never met an omega like Kirishima Eijirou before. He was stunned by the man, slightly taller than him and even a bit more muscular. How the omega managed that was beyond him, but damn he did it well.
He fucking stumbled over his words the first time they met, covering it with insults and scowls. But the fucker laughed, gave him a fucking /wink/ and said,
“Can’t get me down that easily, man.”
Katsuki must’ve looked like a crushing school girl with how hard he blushed. Of course, Kirishima was far too nice to comment on it.
He really never even noticed how great they worked together before they were set against that nondescript villain.
They went in essentially blind, and it wasn’t until too late that they found out the fucker’s quirk.
He could induce heats and ruts from a fifty yard radius. The closer to him, the stronger.
Katsuki noticed fast, Eijirou’s scent got impossibly stronger, and he almost forgot about the mission with how badly he wanted to kiss the man.
“Dude, I feel like shit. What the hell is this guy’s quirk?”
He was visibly panting and sweating with the occasional shudder running through him. He looked /irresistible/.
Katsuki barely had time for the thought before they were ambushed.
Even though the villain didn’t have a combat quirk, he was fucking tough. And Eijirou’s, well, everything, was so distracting. Distracting enough for Katsuki to temporarily forget about the fight and aggressively lick Kirishima’s scent gland.
“Dude! Get control of yourself! We’ve gotta take this guy out!”
Katsuki was hit with a strong wave of shame. Not only was he rejected by a perfect omega, but he was in rut, he was /more/ aggressive and combative. Eijirou was in extreme /heat/, he should be whining on the floor, but he was still fighting like a badass (even if he was whining a little bit). Bakugou felt like an inadequate alpha.
That worked to get him riled up enough to join Kirishima with more effort than he’d put into anything in a long ass time. It wasn’t even a few minutes later that they had the guy in quirk blocking cuffs and the cops were collecting him
The only problem was that stopping the guy’s quirk, didn’t stop the heats/ruts and the second they apprehended him, Katsuki was on Eijirou like he wanted to devour the man.
Not to say it was a one way situation, he’d never been kissed the way Kirishima kissed him. He’d also never felt such a strong need for another person. It went past sexual desire, he wanted to be Eijirou’s everything.
“Let’s get a fucking room.”
They got, quite literally, a fucking room. There was a love hotel not to far from where they’d fought.
Katsuki usually hates the way omegas smell. It’s too sweet, it makes him nauseous. But that’s just another way Kirishima is nothing like regular omegas.
His scent is a bit sweet, sure, but more than that it’s refreshing. It’s fucking cheesy but he smells like spring or the ocean or freshly clipped flowers. Katsuki hates that he’s in rut but somehow this guy’s got him thinking about /flowers/.
“Shit, wanna knot you so bad.”
“Fucking do it then.”
He has to be the most intense omega on the planet. The duality of him cursing and growling with him whimpering and spreading out so vulnerably on the bed is almost too much to handle. He’s fucking incredible.
Katsuki wishes they were wearing regular clothes and not their hero suits, they could just rip those off, but of course they have to break apart to remove a whole lot of shit that just feels excessive right now.
He really thought Kirishima was impressive before, but it was nothing compared to seeing him laid on his back completely nude. His skin is golden and nearly hairless, save for a very attractive happy trail leading to a black tuft above his dick. So the red’s fake, could’ve guessed that. He’s still panting and every intake of breath accentuates the muscles of his broad chest, shining with sweat. And fuck, the best part has to be his thighs. So obviously strong, but covered in slick and shaking slightly. He doesn’t even look real.
Bakugou’s licking the inside of those thighs before he even has time to pull his own pants off. He’ll deal with those later, if he isn’t touching this omega right now he’ll die.
Kirishima’s cunt is a pretty pink and dripping. Katsuki had no idea someone’s slick could be this addictive, but he can’t get enough of it, or of the noises the omega makes while Katsuki’s eating him out. He pulls back a bit to ask “Huh?” when Kirishima says something muffled.
“Call me Eijirou, please.”
/Eijirou/
Bakugou purrs while kissing and biting up the man’s body until he’s sucking on a swollen red lip. Eijirou’s red eyes are lidded and dilated, which goes perfectly with the flush of his cheeks. Who knew heats were so hot?
“Katsuki.”
He doesn’t have to add any more for Kirishima to understand and whine
“Katsuki.. knot me”
In what universe could he say no?
As expected, Eijirou wasn’t looking for anything soft and sweet, he’s in heat for fucks sake. The second Katsuki starts pushing in, he’s trying to urge him to go faster.
“Fucking stop Eijirou. We’re doing this how I say we are.”
Apparently even with him being such an anomaly, an alpha voice still really gets him.
He whimpers again and slick starts gushing out around the head of Katsuki’s cock.
“You’re so fucking hot omega, gonna make you mine.”
He’s past the point of talking, but the way he whines and tries to kiss Bakugou’s jaw says everything about his reaction.
Pounding into him is exactly what his alpha needed. His cunt is so beautifully tight and the fact he has this man whimpering and whining is fucking perfect. His lips are so swollen and shiny it feels impossible to avoid kissing him. The inside of his mouth is so soft it feels fake.
“Gonna mate you. Fucking breed you.”
Eijirou mewls at every word. His body is getting more and more pliant the harder Katsuki thrusts. His omega is submitting. Bakugou fucks into him with more power than he thought himself capable of, but he’ll go to great lengths to please his perfect omega.
He can feel his half formed knot shoving in and out of Kirishima’s hole, and the way he just takes it shows how much he wants to please his alpha as well. If he wasn’t moaning so much Katsuki would worry about hurting him.
He doesn’t even think when he starts kissing and sucking on Eijirou’s neck, or when his teeth break the skin around his scent gland.
He has half a mind to wonder why his omega howls and comes so hard he’s shaking without any warning, but it’s overpowered by his own orgasm as his knot grows too large to pull out anymore.
He doesn’t stop thrusting shallowly for a bit and when he pulls away from where he tore apart Eijirou’s shoulder, he sees a pretty face smiling sweetly at him.
“My alpha.”
He doesn’t know if what Eijirou does next counts as falling asleep or passing out. He nuzzles into his neck before joining him in unconsciousness.
He wakes up feeling like he ran a marathon and nearly screams when he realizes he isn’t alone in his bed. Wait, not his bed. Not his room either, he definitely didn’t install blue and red lighting or a fucking mirror on the ceiling.
Everything that happened comes back to him and he wants to slap the smile off his face. Mating Kirishima was ridiculously stupid but he can’t help being excited. I mean, he had been crushing on the guy a while and he knows exactly what kind of personality he has, he really couldn’t choose a better omega to accidentally claim.
His brain catches up with his heart fast, and his stomach drops when he realizes his satisfaction is probably not reciprocated. Fuck, of course he’s happy to be mated to the perfect man, but he has no illusions about himself.
Sure he’s physically a good alpha, great in fact. He’s always had omega’s knocking down his door. But they all leave once they actually get to know him. Eijirou isn’t going to be any different.
Of course he’ll be nice about it, that’s just who he is, but there’s no way he won’t be running to some surgeon to get the bite removed the second he wakes up.
Well, at least that’s when he wakes up, Katsuki has however long until then to pretend they’ll really be together. He cuddles up to his mate and falls back asleep to the scent of spring flowers.
The next time Katsuki opens his eyes it’s because he hears crying coming from the bathroom. He’s not surprised.
He gets up and goes to the open door to see Kirishima standing in front of the mirror cleaning his absurdly large mating bite. When he notices Katsuki he immediately wipes his face on his arm and smiles brightly while squeezing past him heading to the front door.
“Hey man! Didn’t hear you get up! Hope you slept well. Listen, I gotta get going, but I already paid for the room. Last night was fun and uh, I hope to see you around bro! Bye!”
Not surprised a bit.