izuku loves fucking eijirou because he can grab two hands of that thick ass and drill into it for hours until eijirou is crying from the overstim, and then the fucked silly himbo will just flip over and let izuku ride him until he cums and passes out

god, fuck, izuku with a muscle/himboification kink and he's just so obsessed with the brickshithouse body that eijirou has grown into. it started innocently enough, just a chance encounter in the locker room during a team-up mission had allowed Izuku to see him completely bare

and that's what led Izuku to stand between his legs, completely entranced by a confused Eijirou, waxing poetic about his taut pecs, structured abs, and built biceps... in the heat of the steam coming off the showers and the sauna, Red Riot has pulled Deku into the sauna-

-ripping off his towel to return the favor and get a look at the hero properly where they can't be seen. The steam collects on their skin as they both silently marvel over scars, Kirishima fascinated with how slim of a waist but how thick and round of an ass Izuku has.

Eijirou has gotten somehow impossibly closer, and Izuku can feel the sharp points of his teeth at his shoulder, tracing the muscle up to his neck and jaw before biting down just under his ear and whispering, in a jagged voice, "You can't say all that and expect me to not react."

Izuku breaks his reverent silence with a heated gasp at the feeling, arching to try and bring his body closer to Eijirou's. Somewhere in the depths of his mind, something manages to give him the guts to say exactly what he's thinking.
"Then turn around and let me fuck you."

Whether it's from the sheer audacity it took, or both of their horny minds being more open to suggestion, Izuku's not sure; regardless, Eijirou surprises him by turning and facing the wall, and spreading his legs enough for him to get a good look at that ass.

Something else within Izuku snaps at that moment, and tendrils of black material rise out of his skin to bridge the gap between them, spreading Eijirou's cheeks before his hands can join them. Ei looks back in alarm for a moment before he realizes what's going on and has to-

-muffle a shuddering moan into his arm as he feels two fingers and two tendrils go in dry; the pain as delicious as the stretch as he felt Izuku crowd against his back, his cock still in his boxers but grazing Eijirou's thighs as he ruts against his ass.

the offending fabric is quickly ripped down his legs by another blackwhip tendril, impatiently fisting his cock as he starts to mutter about Eijirou's muscles again. "Beautiful, fucking beautiful, so huge and powerful and so proud of all of it, I love that about you-"

Eijirou only answers with a growl, pushing back against him impatiently. Izuku’s not very big, but it still takes a moment to stretch Ei wide enough. Izuku’s so turned on at this point, all he can do is rut against the curve of his ass after he’s pulled his thick fingers out.

"Love your thick, stacked body, Eijirou, you've worked so hard to build yourself up to work with your quirk more effectively, god, you're so fucking hot-" Izuku's still mumbling as he pushes in, completely dry, conviction coloring his voice. "Goddamn, I want to fuck you stupid."

The wall next to Eijirou's head gives an ominous crack as Izuku starts up a brutal rhythm, Izuku so intent on destroying the thick ass in front of him that he doesn't notice anything unusual until he's halfway in. He pauses to check what the sound was-

and notices that Eijirou's activated his quirk to help brace himself against the wall. He can feel his cock twitch where it's buried inside Eijirou, and his hips stutter involuntarily- only to pick up the pace, going even faster. "Would you like that, Kiri-kun? You want me to?"

Eijirou's rocking back into him, letting out gasping moans, but he's muttering under his breath too. Thinking he's getting through to Eijirou on this, he leans to whisper in his ear, noting the cracks spreading up Eijirou's arms against the wall. "Would you like that, Eijirou?"

It's not until he tries to thrust again that what Eijirou says registers in his mind. "No, I want to fuck- fuuuuuuck. I want to fuck *you* stupid, Izuku-kun."
That gets a loud moan out of Izuku, and he pushes inside Ei the rest of the way in a couple more thrusts. The idea of it-

-just has Midoriya's mind spinning in circles, wondering what Kirishima could mean by that. "I'd like - to see you try," he challenges between thrusts, doing his best to fill Ei completely with every single movement and panting with the effort. Eijirou is a lot bigger than him.

A fact that he only has a couple seconds to register, and Eijirou's reached around, pulled Izuku out of his ass, and flipped their positions so Izuku's back is against the wall, all within a couple seconds. "Like I said, I'm gonna fuck you stupid. But first, gotta thank you."

Izuku's head is still spinning for the quick position change, so all he can manage is a quick "huh?" which makes Eijirou pause long enough to smirk. "You took me to dinner on the first date." And with that, he's somehow pulled Izuku's legs out from under him, and perched-

them over his shoulders, looking up at Izuku from between his legs. "I meant what I said, I'm gonna fuck you so hard, you'll lose brain cells and gain some more muscle in the process." And with no hesitation, pulls in closer and licks a rough swipe over his hole.

"Would love to see you crying on this thick cock," he rumbles, diving in and plunging his thick tongue deep into Izuku's hole. He instinctively clenches down, which only invites Eijirou to go faster, making all sorts of sounds that seem so much louder in the enclosed space.

He hasn't bottomed in a while, but Izuku will still need some prepping, and Eijirou seems to pick up on that pretty quickly. Two thick and long fingers soon join his tongue, all the lewd sounds intensifying as Izuku feels the flush spread up his chest. He was still distracted-

though, by what exactly Eijirou had meant. Did they mean the same thing? "Buh- but-" He tries to ask, and Eijirou seems to find his prostate at that exact moment, brushing over it harshly with calloused fingertips. "That's right, now you're getting it, Izuku. Just like that."

He keeps fingerfucking Izuku, pulling away enough to speak and look up at him. "I want you barely able to string together a coherent thought. I love hearing you go off about whatever, but isn't it- so- much-*easier*-" He punctuates each word with a hard thrust of his fingers.

"So much easier, to just feel amazing, and let someone make you feel good? Huh? What do you think about that, Izukkun?"
Izuku's barely able to answer, every prod to his prostate feels like he's going to tip over the edge, and Eijirou hasn't even slid his cock inside yet.

He thinks he could cum just like this, but without waiting for an answer, Eijirou's slid his fingers out and hosting him up again by the hips as if he weighs nothing at all, heading for the sauna's bench and propping him against the wall.

Izuku's panting from all the sudden rough treatment, but he *loves* it. He's so hard, he feels like his cock could cut glass. But now he's face to face with Eijirou's monster of a cock, and then he can feel fingers in his hair, tugging him to look up at Eijirou. "Suck it, runt."

His lips wrap around Ei's achingly hard cock, and the fingers in his hair move to cup the back of his head instead, urging Izuku to take in more and more of Eijirou's cock. "I want you to choke on it, and lose brain cells- don't worry, I'll help you replace it with more muscle."

With the hand on the back of his head guiding him, Izuku wants to push even harder, wants to take the whole thing down his throat, if he can manage it. His tongue leaves at the underside as best it can, his small mouth having to stretch to accommodate Eijirou's impressive girth.

Eijirou covers a moan with a dark chuckle, scratching at the green curls gently. "You're taking it so fucking good, little runt. I can't wait to help you grow yours to be this big- I know some tricks-" He's cut off by Izuku speeding up, bobbing his head quickly in response.

"Oho, you-you like that? Wow, who would have guessed that someone like you would like that?" It's so hard not to take advantage of this and thrust back into that hot, wet little mouth, so eager to please. "Stop, you're gonna make me cum, I wanna cum in that little round ass."

Izuku pulls back with a wet sort of cough, and Eijirou releases his hair, growling just loud enough for him to hear. "Show me that ass, runt, and hold still."
He doesn't seem in the mood to wait around, so as soon as he catches his breath, Izuku turns sideways on the bench-

-popping his ass in the air so Kirishima can get a good look at that wet hole. Eijirou strokes himself a couple of times, and growls again. "Hold yourself open. Come on, Izuku, show me that gorgeous ass of yours. One last look before I help you beef it all up."

Scarred, freckled hands reach around to pry equally scarred cheeks apart, hips pushing back invitingly. Without hesitation, Eijirou leans down, biting Izuku hard on the asscheek. "Fucking delicious. Gonna split it open, Midoriya-kun. Can't fucking wait."

Izuku yelps in surprise at the pressure, quickly shifting to a moan when Eijirou pops a couple fingers in his mouth, pulling his cheek open slightly so Izuku has no choice but to moan and drool, open-mouthed, onto the bench below. Eijirou's cock manages to dribble a little just-

-before he slides it home in Izuku's ass, grunting with the effort. "Fuck, you're tight, runt. Gotta make sure we keep it that way, or maybe I'll just mold your cute little insides around my cock. What do you think?"
Izuku can only let out a wet-sounding whine.
"Thought so."

Eijirou picks up the pace, intending to bottom out fully in Izuku's ass before he can manage to come. The rhythm he sets begins to make the sauna bench knock against the wall with every thrust, the wood creaking underneath Izuku's knees and palms. But the noise is barely audible-

-over all the moaning Izuku is doing. Eijirou is *so thick* inside of him, he's never taken a cock this thick before. He's trying to keep up with the pace, but the way his prostate is getting slammed into every other thrust has him whining for more... less? He's not sure.

The sounds he's making around Eijirou's fingers reverberate in his ears, sounding even louder against the sauna's walls. The stretch of his lips and jaw along with the treatment his ass is getting means he's probably not gonna last much longer. His ears are buzzing in time with-

the moans Eijirou is grunting out, and he feels himself whine rather than hear it when Eijirou slows his pace, coming to a stop and laying over Izuku's back to whisper in his ear. "Yes... doesn't it feel so good to not have to think, and just be a good little cocksleeve for me?"

The moan that gets ripped from Izuku increases in pitch when Eijirou slams back into him the moment he tries to answer. "You don't need to talk, little runt. I'll show you how to be the *perfect* little himbo cocksleeve. That's what you *wanted* to do to me, right?"

Izuku's moans nearly sound like sobbing, at this point, he's so desperate to cum. It was true, Eijirou had seen his plan coming a mile away, and he couldn't fathom how he'd figured it out so quickly. Not that he could think much at all right then, anyway.

"Good, I thought you'd agree- now cum for me on my cock like the cute little runt you are." Eijirou's hips picked up the pace again, the bench under Izuku creaking ominously until Eijirou's nearly pulling Izuku up and down along his cock, using his body like his own personal toy.

Izuku's ass clenching around him as his orgasm is ripped from him, Eijirou growls in his ear and finishes with a few more brutal thrusts- only for the floor to seemingly drop out from under them, in a flurry of snapping wood.
Through his cockdrunk haze Izuku realizes that-

-they broke the sauna bench.

Splinters and broken fragments of wood surround them on the tile floor-

Eijirou blinks at their surroundings, cock still buried in Izuku's hole, and starts to giggle quietly.
Izuku takes this as confirmation, snorting out a little laugh of his own.

Eijirou takes the moment of distraction to gently pull out from Izuku's ass, helping him up and out of the path of any splinters. "So, we're uh, gonna pretend that part didn't happen, right?"
"Uh- the bench, or all that hot shit you just said to me?"
"Oh, the bench. Duh, bro."

They're still very much naked, but they quickly grab a real shower, change into their clothes in front of each other, but Izuku's ears are still burning from all the things Eijirou said to him. He has to know...
"Did you mean it, Eijirou?"
"Which part?"
"All of what you said-"

"Yeah. I meant every word. You seemed into it, though. If you want that, I can-"
"Yes, I do."
Eijirou's smile looks positively lethal in the light from the changing room. "Then yeah. We can talk about it. You have my number, right? Text me any time."
"What about Kacchan?"

Crimson eyes meet emerald in their reflections, Eijirou looks completely unbothered, reaching for his phone and typing quickly, then thinking better of it, hitting the button to call Katsuki instead. He picks up right away, Izuku can hear him answer.
"Hey. You busy, babe?"

Izuku hears something he can't quite make out, but Eijirou smirks in response. "So, I just wanted to tell you I fucked Deku. You mad at me for that, or we gonna move on?"
Eijirou pulls the phone away from his ear and puts Katsuki on speakerphone so Izuku can hear his answer.

At first, there's a beat of silence, but then Katsuki starts chuckling lowly. "Is that all? And you didn't feel like sharing? Nah, I don't give a fuck. Wreck that little twunk ass for me, babe."
Izuku's eyes grow wide, looking from the phone to Eijirou's face in disbelief.

Eijirou smirks at the expression on Izuku's face, hanging up without another word. "So, now you know Katsuki and I aren't exclusive. But this also doesn't have to mean anything. We can just fuck and not do any kinky shit, you know."
"I know- but, Eijirou-"
"Your choice. Call me."

And with that, Izuku is left to watch Eijirou scoop up his clothes, humming happily to himself and completely unbothered, as if he didn't just ream his former classmate a new asshole in the sauna.

"What the actual fuck," Izuku whispers into the silence of the locker room.

[END]

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