Retsu Aku

Retsu Aku is a freshman Rara's high school and is constantly harassed by the clubs at school because of his athletic ability and refusal to join any of them. He is almost always seen with his friend Kayato Higuchi. Retsu first meets Rara after spotting her jumping off a roof (intending to fly to school). He mistakenly believes she's going to kill herself and "saves" her by jumping after her and cushioning her fall. (Source: Wikipedia)