Miyu, a former idol, has been raising her son as a single mother. Her son goes to university and moves to Tokyo. One day, by chance, he sees his young mother in a gravure photo book in Tokyo and falls in love with her. Her son returns home for the first time in a long time. Right in front of him is his former idol mother, who masturbates every day... They're mother and son, but... he can't hold back anymore. After much conflict, Miyu finally gives in to her son's advances. Forgetting that they are mother and son, they make love many times at the inn...