Kazuki Sanmiya

Mugi’s best friend since childhood. He looks about four years older than his actual age because of his dark complexion. Can be seen as a delinquent by people who do not know him because he drinks, smokes, get into fights, and rides a motorcycle. Because of this image, he is both popular among younger girls and also feared by others, like Manami’s friend Fumiko. Most girls that he flirts with flatly reject him, those that don’t usually slap him because he is too forward. Strangely, after he begins dating Manami, he has started to clean up his act in order to feel that he is deserving of her. (Wikipedia)