VENU-800 Kyoko Kubo plays with her dirty father-in-law's wife who has retired and has free time.

Kyoko, a wife who has been living an ordinary but happy life with her husband for five years. However, Kyoko also had one problem. That is living with my father-in-law. It was frustrating that I couldn't get closer to my stepfather, who doesn't talk much, and it was also creepy that I couldn't understand what he was thinking. However, one day when her husband was late coming home, she heard something from the bathroom.