Mayu is a mother with a shy and withdrawn son, Shinya. Two of her son's friends come to visit her, which is unusual, and Mayu is happy that her son has made new friends. However, a few days later, they show up again, showing their bandaged arms and telling her that Shinya had been violent towards them. Their eyes are fixed on Mayu's voluptuous breasts... In order to atone for Shinya's sins, Mayu accepts their obscene demands one after the other. #ChiefP