One day, Reiko, who lives with her daughter and her husband, witnesses her son-in-law, Hikaru, indulging in masturbation in frustration. Reiko who couldn't take her eyes off of her too huge thick Ji Po ... - When she learns that her daughter and sexlessness are the cause, she continues to play with his and seduce her, saying, "I'm not going to be my daughter." - Hikaru, who is always accumulating sperm, can't resist such an invitation from her mother-in-law ... He succumbed easily. Since then, the two of them have stolen the eyes of their families and secretly devoured pleasure.