Chapter Text
“No way! Mina does dance. She’s gotta be the most flexible.”
Katsuki furrows his brows as he walks through the common room of the 3A dorms. It’s been blissfully silent the last few days, the class all studying for midterms and preparing for internships. He himself has spent the last three hours held up in his room attempting to study for the upcoming exams. Attempting being the operative word. Because it’s hard not to get distracted when his beautiful, smart, passionate, annoying boyfriend is sitting on the center of his bed looking perfect in all his freckled glory and mumbling up a storm over his history textbook.
He had made an excuse to escape, claiming he needed water and a snack so that he could rid his mind of the urge to shove their studies away and kiss those stupid mumbles to silence. Of course, Izuku immediately requested his own water and snacks and so at that point how could Katsuki back out? Now he’s on a mission to give his stupid boyfriend everything he asks for in life, that being a bottle of water and a pack of pocky.
“Yeah but Mashirao knows Karate. That's gotta require some flexibility right?”
“I mean sure Tooru, but I think dance is a little more bendy.”
“We’re forgetting that Sero is like literally a Staples brand Spiderman.”
“Aaaw, Denki! Thanks bro. That’s so sweet.”
“I got you bro.”
Katsuki sighs at the visible lack of brain cells between his idiots. “The fuck are you morons goin on about now?”
Mina perks up. “BAKUGOU! Who do you think is the most flexible in the class?”
“Tooru thinks it’s Oijiro but I think she’s biased toward her hubby.” Sero supplies.
“Ei thinks it’s Mina cause of her dance experience and she agrees.” Denki offers.
“Yeah cause I’m perfect.” Everyone ignores Mina's commentary.
“Denki and Hanta both think it’s Han cause he’s like Spiderman or something.” Kirishima finishes off.
“Settle it for us please?” Hagakure asks.
“You’re all wrong.” He grumbles.
“What? No. Who is it then?”
“It’s obviously Deku.”
There’s a long beat of silence where Katsuki considers turning for the kitchen to complete his original task. But then he registers the stupid dumb faces on his friends and realizes they don’t believe him. Stupid, if you ask him. Izuku is the most flexible person Katsuki knows. And he would know. He’s seen it up close and personal. In training, in gymnastics, as kids at the park.
In his own bed.
Contortionist is the term that comes to mind when he thinks of Izuku's flexibility. It’s like the fucker has no joints. Course Katsuki knows that isn’t true, given the extra one in his pinky toe that nearly damned Izuku's entire future at the age of four. But Katsuki watched his freckle-faced idiot boyfriend pull his own leg up to his shoulder once just to fit under a TV stand and that was the day he knew he was gonna wife up a freaking alien or some shit.
“Dude. There’s no way. Midoriyas like jacked. A build like that can’t possibly be comfortable for something like backbends or the splits.” Sero finally voices.
‘I dunno. I bent his back perfectly fine over my desk about two days ago while I-’
“What? You want fuckin proof or somethin? He did gymnastics our whole lives. Pretty sure he still goes to some of his old classes as a mentor. I was convinced the fucker has like no bones till he started fucking breaking them all the goddamn time.”
“You’re saying he’s like double jointed or something?”
“Hell if I know. All I know is he can move his body in ways no human should ever be able to.”
“Get him down here, I need to see this.” Mina exclaims, stars practically shining in her eyes.
Katsuki sighs and shoots off a quick text to his boyfriend. He thinks this is a waste of time. Everyone’s seen Izuku doing stupid shit during training. Nobody should be able to kick that high and yet Shoot Style routinely feels like a ten ton truck smashing into the side of his head like it belongs there. But even Katsuki can admit that everyone needs a break from their studies right now and he’ll never pass up an opportunity to see his Deku bent in odd positions and frightening the wildlife.
Gods he loves that loser.
Not even five minutes pass before a mop of green hair emerges from the stairwell and bounds up to the blond with a bright smile. Several people, Katsuki included, need to look away from the blinding light. For someone who has been studying nonestop since he was practically born, Izuku has way too much energy for the world right now.
“What did you need, Kachaan?”
“The idiots wanna see how flexible you are and you need to get your nose out of your notes for at least five minutes before I blow up your damn textbooks.”
Katsuki definitely does not soften at the sight of that pout, shut up Mina.
“Oh um, o-ok? What do you guys want me to do?”
“Whatever you want! Kats is making it seem like you can just like ball yourself up no problem. We got curious.” Mina says. The others all nod.
“Oh uh yeah. Alright.”
Izuku nods slightly and stumbles his way past Katsuki to the space between the front door and the main area of the common room where there’s no furniture to block his movements. He does a few quick stretches, bending his back slightly then stretching his arms and finishing with his legs. Then, without much hesitation, he raises his arms and bends backward until his palms touch the floor and he’s standing in a perfect arch.
Before anyone can comment he flips his legs up, supporting his weight on his hands as he spreads his legs in the straightest areal split Katsuki has ever seen. He keeps his hands planted firmly as his hips twist, his back twisting with them in a way that would pop Katsukis spine and probably break Kirishimas, He plants his feet down above his head and twists back up into a standing position.
He smiles at the group and Katsuki can tell he’s not done. Those legs spread once again, lowering him down into a proper split. He twists his back again, almost a full 180 until he can lean forward and press his forehead to the carpet behind him. Katsuki hears Mina gasp at the sight. Izuku twists back into his split before shifting one leg behind him. He grabs hold of the ankle in front of him and brings it up to lock behind his neck with practiced ease. He slips one through the gap between his leg and body, his elbow bending out in a way that looks uncomfortable but Katsuki knows is just normal for his boyfriend.
Somewhere in the silent group he thinks he hears Denki gag.
With the other hand Izuku reaches behind him, his back bending with the reach and Katsuki watches his shoulderblade shift with the movement. He grabs his other ankle, bending it up to rest against his temple. And then he just glances at the group with a smile as if he’s not sat on their floor in a pile of limbs that looks mangled and painful but really isn’t. And in that moment Katsuki wishes he could sling his crazy, boneless boyfriend over his shoulder and hide away for eternity in his room, doing unspeakable things to his boyfriend and testing the truest limits of his flexibility.
“That’s-”
“Gross?”
“Impressive. But yeah also kinda gross. I say that with love sweetie. I just also think I might be sick if you don’t look normal in the next five seconds.”
Izuku just chuckles at Mina and Seros dramatics but he does uncurl from his wack ass position, bringing his legs forward and stretching them out. Katsuki knows it’s mostly for show. Izuku isn’t invincible. He’s seen his boyfriend pull muscles or end up sore after gymnastics days or contortionist antics like this. The most notable was a day he tried crawling into a small, abandoned fox den in the woods. They were maybe ten at the time, relationship already strained but not quite abusive yet. Their parents forced them to play together and Katsuki, not needing to keep up appearances, didn’t feel the need to refuse or be mean for once.
Sometimes he wonders if it was moments like that that made it so easy for Deku to forgive him.
The burrow was just barely too small and so Izuku had easily twisted his back once he got his legs through. He tucked an arm back against his spine and slid in. but at the last second his other arm got caught on a stubborn tree root and when Izuku tried to twist it free to pull it to his chest in the burrow Katsuki heard a sickening pop sound followed by Izuku’s muffled screams from the fox burrow. Katsuki helped him out of the den and it wasn’t until he saw the odd angle of Izuku's shoulder and the way his arm hung limp at his side that he realized the twist had popped Izuku's shoulder out of the socket.
But that was nearly eight years ago. Izuku has learned to be more careful since then. He knows his body's limits, limits Katsuki still wants to learn as intimately well as he possibly can, and this small performance for their classmates was the farthest to reaching those limits that Deku could have come. Still though, he stretches his arms and legs and twists his back a few times as if chasing away a soreness Katsuki knows doesn’t exist. And then he just simply folds his legs under himself in a blissfully normal position and offers another smile.
“So how did this come up?”
“Oh um, we were debating on who was the most flexible in the class. Bakubro said it was you and we didn’t believe him. I um…I think we believe him now.” Kirishima explains.
“I think you deserve an award or something.” Mina exclaims. Izuku sputters immediately.
“He has enough of those from gymnastics he doesn’t need more.”
“Kachaan!”
“Yeah but that doesn’t do this justice.” Mina says. She sounds oddly offended.
“I have to live with him after we graduate you fuckheads. I am not coming home everyday to some shitty plaque that proves he’s not human.”
“Oh my god guys please?”
“Well then what do you suggest Bakubro? He deserves something. That was disturbingly impressive.” Denki asks.
Katsuki turns his glare on Izuku, his expression softening exponentially at the sight of a deep flush and shy green eyes looking up at him through equally green fringe. He seems to consider for a moment, though he already knows exactly what kind of reward his deliciously bendable nerd deserves. He offers a small smirk and Katsuki watches a slick tongue lick at plump lips as Izuku subconsciously squeezes his legs together. Good. They’re on the same page then.
“I think I have a few ideas.” He says, never once taking his heated gaze off his boyfriend.
Izuku, for what it’s worth, never takes his own eyes off of Katsuki either. Not even when Kirishima chuckles at them or Mina whispers a soft ‘yaaas get that ass.’ Not when Denki and Sero both wolf whistle at them as Katsuki approaches him. Hagakure stays blissfully silent, assuming she’s even still here. Katsuki and Izuku both ignore the teases as he leans down and wraps a strong arm around Izuku's waist, hefting him over his shoulder with ease and starting for the stares with a quick smack to his boyfriend's ass.
“Ack! Kachaan! What about my pocky?”
“Fuck the pocky nerd, I want my snack first.”