Ryoko, who is in her fifties, lives with her son. Her sexual desire is extremely strong, and she uses her son as an outlet for her sexual desire. One day, his older brother, who is in charge of the company, comes to visit. Rich SEX that flares up again with my brother who had a relationship before. Intense SEX with my son who came home. A fifty-year-old mother with a ripe body suddenly changes into a woman.