Ai has not worked at night with her husband for a long time and has been too affectionate towards her son Takashi. One day, he witnesses Takashi being bullied and invites the leader Tanaka to his house. She convinces him that she does not want to be bullied anymore but Tanaka asks to strip to mock such love. It is love that becomes naked if his son can be saved by sacrificing himself, but the desire to bully children including Tanaka only escalates.