Natsumi, a school teacher who was plagued by her drunken husband, managed to get through her past with her student Osawa. One day, he meets Osawa, who has become a member of society, by chance. Osawa senses Natsumi's current situation and says, "You can always count on me." Even if they are no longer teacher and student, they are still unfaithful. But the two can't stop...!
