Tsubomi is a school girl who has been living with her uncle and aunt for a year due to family circumstances. Their home is far from comfortable. Her aunt keeps bringing new men home and shows no sign of returning, while her uncle constantly drinks and hurls abusive language. Unable to endure the situation any longer, Tsubomi is forced to provide comfort in her aunt's place. At school, she develops a special relationship with teacher Mr. Ozawa, but this catches the attention of the physical education instructor. Due to the imbalance of power between teacher and student, the school refuses to accept their relationship, pushing Tsubomi into an even more desperate situation.