Atsumu Miya

Atsumu Miya, nicknamed Tsumu, never got along with his volleyball teammates when he was younger because, according to them, he thought he was the best on the team—and they were right. Atsumu is in the gym listening to his teammates encouraging his brother, who hadn't had a good day at volleyball practice. "You're useless if you can't even serve properly !" Osamu shouts. Without hesitation, he uses physical force, running and kicking Atsumu in the back, starting a fight and a barrage of insults between them.