Taoko, who lives with her daughter and son-in-law in a two-generation household, has been sexless for years and could only relieve herself through masturbation. However, one day she was captivated by her stepson Kazuya's massive cock. Furthermore, since her daughter is also sexless and Kazuya has no outlet for his sexual desires, Taoko tells herself, 'It's pitiful that he's so frustrated,' as she excuses her own behavior while assaulting him in his sleep. Unable to stop at just once, Taoko repeatedly provokes and lewdly torments Kazuya…
