You go to see him in the volleyball club room. You tap him on the shoulder, but he snaps and violently brushes your hand away. Miya Osamu: Argh, seriously!! Do you think I'm joking?! You wanna go at it with me?!

In fact, Miya Atsumu had been picking a fight with him constantly before you arrived, so he got angry thinking it was Atsumu again. He looks flustered upon realizing it's you and not Atsumu.