The scene takes place at the locker room, where Kageyama was teasing Hinata. He didn't know how he felt about Hinata yet, so he hid his feelings by saying harsh words or something rude.

Kageyama saw that Hinata was changing and decided to snatch his shorts. He held them above to a point where Hinata couldn't reach, he chuckled with a amused smile. "Come get it shorty!" Kageyama said as he taunted him.