now i sit here thinkin fuckin nerdy-ass izuku who's deceptively small bc he slouches a lot or does his best not to stand out but when he actually stands up straight he's big! he has all that shit hidden under his dorky ugly clothes and katsuki wants to get to the core of it

katsuki wants to rip those ugly clothes off and dick down whatever giant he unearths

Okay so im going in this a bit. they were childhood friends that drifted apart around end of grade school, like not bc of anything major. katsuki was just more outgoing & loud while izuku liked quiet more so they kind of just gravitated towards different interests & friend groups

despite that they always had the tendency to find each other in crowded places when they knew the other would be around. sometimes they greet each other or catch up a bit but its awkward and their friends always drag them in separate directions. so they just take whatever they-

can when the opportunity arises.

one summer when izuku's growth spurt comes barging in and knocking down his door, he's dismayed. he hates how gangly he is & how awkward it is to maneuver around shit at home, so he spends the rest of the summer doing house friendly workouts.

he keeps at this even into their first year of high school and at some point just accepted that its part of his routine now. he still wears the same ugly shit he does (layers of oversized clothes) and walks around like he'll get detention if he straightens up his back.

katsuki doesnt really notice any changes bc you see a motherfucker enough on the daily it just comes off like someone moved all the furniture in the house by 2 inches to the left. now, the day he actually notices theres something different & he so gracefully bumps into the moved-

furniture was during a house party in the summer before their senior year of high school. izuku is unfortunately abandoned by his distracted friends, left to his own devices (5 red cups) & is slumped all alone by the garden. katsuki is on his way out bc he's bored when he sees-

the pathetic mess that is his childhood friend. he's feeling generous though and he doesnt want aunty inko to worry about this dumbass. so he takes it upon himself to get izuku home. it'll be easy he thinks. he can totally carry the nerd to his car. its not like he weighs much.

it's probably all clothes haha why does that idiot wear so many layers.

he gently shakes the nerd awake telling him that he'll be the ride home. and as he grips izuku's sides and applies more force to carry him, katsuki freezes. izuku feels Very Solid under his fingers.

he shakes his shock off and tries to lift izuku properly this time and he cant believe that he's actually struggling. now that he looks he doesnt even see more than 2 layers of a button-up and a jacket on izuku. katsuki's just semi-crouched by the garden w a half drunk nerd-

dangling from his arms. he wants to process everything right now but he's overwhelmed, so he drops izuku again and doesnt mind the grunt of pain from the floor. katsuki wades back into the party to get eijirou and sero to help him haul izuku back into his car. his questions-

can wait until another time. he's just glad that by the time they arrive at their neighborhood, izuku is coherent enough to get out of the car by himself and wobble back home.

much later that night, katsuki lays down in bed staring at the ceiling, confused & a bit turned on.

the moment classes start again, katsuki watches izuku like a hawk. determined to get reacquainted w the new arrangement of furniture. much to the discomfort of his friends & izuku (nerd cant see who it is but he just knows someones staring but he's 2 busy slouching like an idiot)

katsuki starts noticing how izuku is a lot wider at the shoulders now. his clothes arent multiple layers like he always assumed & the jackets just /seem/ oversized, but oh boy, if he looks harder, he can see how whatever shirt or button-up the nerd wears really hugs his torso.

he tries to wrack his brain for answers. he doesnt remember if izuku was taking any sports or even talks or posts about working out? he knows damn well that the nerd doesnt leave his house that often & he's sure he hasnt ran into him jogging in the early mornings. it frustrates-

katsuki that he missed out on an entire thing! about the one person! he never took his eyes off of! how the fuck!!! but its not like he's about to admit that to anyone either.

but not to be beaten at whatever this is, katsuki devices a plan to get to the bottom of this.

katsuki doesnt really wait for an answer because the bell rings signalling the start of classes. izuku is left there wondering if he should start fearing for his life or just brush the strange encounter off.