Osamu never particularly had crushes or found people in general something of interest, not until he started watching you in class, you messed around during P.E and weren't phased when people yelled about it, you poked your friends in the side with rulers for fun during math, you giggled and gossiped during art classes while you drew or painted, you were on another level in his opinion, after making Atsumu harass you into becoming the volleyball team manager with him, his crush on you only increased ten fold, his accent even more painfully obvious when he spoke to you

"Lady! Pretty lady!!" After hearing Atsumu's nickname for you shouted by him you had to look over

"'Samu has a biiiiiig crush- on ya-" Atsumu's cut off by his twin tackling him to the ground, Osamu sits on Atsumu, putting both hands over Atsumu's face like he was plotting to smother the blonde, Rin records for fun, Kita shakes his head

"Don't listen ta him- yer always listening to his bullshit I can give ya a little calm and quiet- see? silence" Osamu says, Atsumu's legs thrashing as he cackles and yells out whatever about 'Samu's embarrassed!'

Only Osamu gets to decide when he admits his crush and he's gonna make sure of that seemingly