Productoras
Chisato, Natsuki, and her son-in-law were living together as a trio. Among them, Chisato and the son-in-law had become involved in an affair. One day, Natsuki's sister, Yuri, came home, saying she had fought with her husband. Everyone listened to Yuri's complaints. Another day, Reiko, Chisato's sister, came home from Hawaii after a long time. Yuri sees Chisato and her son-in-law having an affair. Yuri and Reiko, who haven't seen each other in a while, each seduce the son-in-law and have sex with him. And when Natsuki goes out to a drinking party at work, Chisato, Reiko, and Yuri corner the son-in-law, and 4P sex begins…
