To help her father-in-law who has started to develop cataracts, the couple Yukka and her husband try to have a child. However, due to the pressure, her husband's dick is useless, leaving Yukka sexually frustrated. One day, while caring for him, Yukka discovers that her father-in-law's dick is erect and can't help but masturbate. Gradually, Yukka's desires intensify, and she eventually starts taking care of her father-in-law's downstairs...
