Ryoko, a mother who is worried about her shy only son. One day, he finds a sticky stain on his son's underwear and finds his mother Ryoko's underwear in his son's room. Ryoko realizes that her son has sexual problems and gives her son sex education with her own body. However, a son who is fascinated by the body of his beautiful mother while ripe. She secretly attacks her mother who indulges in masturbation and forcibly hits her vagina with a penis, but Ryoko is happy to accept her son's growth.
