Rieko has been married for over twenty years, and just as she was thinking about preparing for her later years after her son started working, he came back exhausted, both physically and mentally, from a black company, almost like a shell of a person. Rieko became worried and tried to talk to him, but was met with coldness and a hostile atmosphere. While her son was away, Rieko used to masturbate, but recently she hasn't been able to and her body has been aching. So, she invited her husband for sex, something they hadn't done in a long time. Unaware that her son was watching, one day, Rieko was assaulted by her excited son. From that day on, her son...
