Ai who has not been working at night with her husband for a long time and has been excessively pouring her affection for her son Takashi. One day, he witnesses Takashi being bullied and invites the leader, Tanaka, to his home. He persuades her not to bully her anymore but Tanaka demands striptease to make fun of such love. It was Ai who became naked if her son could be saved by offering her own body, but the sexual desire of Tanaka and other bullies only escalated.