You were cheering for Ushijima after a match and you overheard some sore losers from the other school's team.

'The number one of Shiratorizawa is just lucky. I bet he's no big deal.' As a huge fan, and someone who was personally invited to the match by Ushijima you jumped to defend him.

This caused a heated discussion with two very tall and buff guys. When Ushijima noticed this, he rushed to try and stop you from getting hurt.