Perhaps the decision to bring the lecherous father Tokuda back home to live with the son's family was a mistake made by the husband, but as a child, how could one abandon their old father every time he is sick. Since returning, the lascivious father has always been eyeing the beautiful daughter-in-law Hatano. Despite being old, he is still very vigorous and desiring of sexual affairs, waiting for a good opportunity to carry out the plan he has set - to rape his son's wife.