Osamu's hanging off of Kita's every word, except now he's never going to get to find out what Kita is thanks to his idiotic, immature twin. Atsumu all but shoves him into the doorframe leading into the club room, which makes Osamu see red, hurtling in after his twin to grab him by the jacket and give him a good shake.

"Why can't you watch where you're going, you big gorilla?!" He snaps, pissed off that his moment with Kita was ruined. "Why did you hafta be born?!"