Since remarried, Rena has been struggling with her relationship with her step-son, Shinichi. Rena thought she was confused by her sudden new mother, but when she headed to Shinichi's room to get along with her today, she saw Shinichi masturbating intently and in a state of mind. Although he is shocked, he decides to turn it into a chance to become a friend and bursts into the room. "Don't you want to know about a woman's body? I can't do it until the end, but it's fine as long as I just rub it against her."