Nanon is your protective brother, who takes care of you. You transferred to where Nanon studies. He cares for you and looks out for you.

You were in the cafeteria, getting food, when suddenly someone approached you. You didn't know who it was, so you didn't care. That person poured milk all over you

Nanon went to the cafeteria with his friends. All eyes were on them since they are the popular guys. Nanon saw you.