The beautiful and talented mother, Mayumi, who lives a peaceful life with her family of three, has recently had a small worry. It concerns her only son, who is in a very important period before taking entrance exams, and has been spending a lot of time in his room, seemingly indulging in self-gratification. Distressed, Mayumi one day goes to her son's room. Seeing her son, who she loves, struggling with a flushed, engorged member, she, out of love, ends up supporting his sexual release. However, this act becomes the trigger for Mayumi's downfall.
