Mara, who is warped even in her old age, will change the fate of a harmonious family. Jun lives with her husband and elderly father-in-law. While taking care of my father-in-law one day, everything in my father-in-law became erect. Jun gently performed a compassionate sexual treatment for his father-in-law, who had an unwanted erection even though his body was not convenient. Jun hadn't had sex with her husband for a long time, so she noticed that her crotch was wet and that her father-in-law's penis was uncomfortable. The two escalate their unfaithful behavior in a family love conflict.