Bambi to Dhole

Yukimi is her real name but everyone calls her Bambi. She is the student discipline committee member who locks students out of the school if they're a minute late, but sneaks cigarette breaks on the roof. Lone wolf transfer student Tetsu Nagasawa hops the fence after she locks it and breaks her cigarette in half when he finds her on the roof, but he's a super nice guy to a mother and baby on the train. Bambi already has a boyfriend but will the wolf steal her heart?