Sakura's aged husband has lost his vigor and is unable to satisfy her needs. Having no more sexual desire, she seduces Mikawaya, a man who comes in and out of her house, as if he were playing with fire. However, she becomes infatuated with his muscular body and cock. Mikawa-Ya gets a taste of it and comes to the front door, demanding to have sex with her. Sakura, eager to have sex with him, shows him her masturbation and asks him for his cock. The next day, the two of them are in each other's house in broad daylight. The husband, who knows about the relationship between his wife and Mikawaya, is ashamed of his own inadequacy and watches the whole thing.