Yuki suffers from frustration because she is not satisfied with sex with her light-hearted husband. A father-in-law who feels sorry for Yuki who comforts himself so as not to be noticed by her husband. The father-in-law, who blames himself for his son's incompetence, invites Yuki to atone for his sins. Yuki is involuntarily fascinated by her father-in-law's splendid meat stick. Yuki was puzzled by the immoral act, but it was impossible to suppress the body that was in heat.