Ever since her father's affair was discovered, her mother, Rikako, has been depressed. Worried about her Rikako, who is losing her energy day by day, she reveals her feelings that she will protect her in place of her father. The two will step into forbidden mother-child incest. Rikako accepts Katsu, even though hesitating, and is surprised at her matchlessness. A meat stick that remains hard no matter how many times you put out hot sperm. Every time she is served in her, Rikako's heart forgets her husband.
