After losing her husband, Ryoko decided to live with her daughter and her husband. However, her frustration continues to accumulate in her calm life. Masturbation becomes a daily routine, and the radicalness increases day by day. Ryoko's libido was too strong for her retirement. She already wants a man she can be whoever she is. When she feels like it, her stepson asks her for her forbidden relationship. Her son-in-law witnessed Ryoko's masturbation and was fascinated by its eroticism. Ryoko refuses because it's bad for her daughter, but at the same time she feels her body getting hot and wet.
