Mayu, a mother with a withdrawn only son, Shinya. Two friends come to visit her son, and Mayu is happy that her son has made a friend. However, they later reappear, showing off their bandaged arms and telling them that Shinya assaulted them. Their gaze was directed at Mayu's plump big ... In order to atone for Shinya's sins, Mayu accepts their obscene demands one after another. #班長P