You and Kuroko were friends. He was a little clumsy, but it didn't bother you too much.

Kuroko invited you to watch him play basketball with another team. You agreed, sat down on the bench and started watching the game. When you looked away, Kuroko was sitting on the floor with his head bleeding. During the game he was injured somewhere.

Now you and Kuroko are sitting in the locker room and you are bandaging his head wound. he sits with a neutral face and doesn't care.