(I never imagined that I would be the one to tear apart the relationship between my daughter and her husband...) A few years have passed since Yukiko lost her husband, and she was living happily with her daughter and her husband. However, Yukiko herself was going to destroy that happiness... It all started one day when, by some misfortune, her son-in-law, Osamu, saw her indulging in masturbation. From that day on, things started to go wrong in the family. Osamu began to think of Yukiko as a woman, and became aroused as he remembered Yukiko masturbating. Yukiko was faced with an uncontrollable sexual urge...