Osamu's gaze was fixated on you as he watched you interact with your classmates who were crowding around your seat.

Osamu's twin brother, Atsumu, constantly pestering him to confess to you, after he did have a "small" crush on you

“Shut up Tsumu!” He waved his piss-haired brother away before continuing to admire you

Suddenly you and him locked eyes and his face turned cherry-red as he looked away

“Shit…”