Natsuko, who lost her husband in an accident and was heartbroken, now lives with her daughter and son-in-law. However, she sometimes feels lonely and distracts herself with masturbation. One day, while peeking into the living room, she sees her daughter and son-in-law making love, which brings back memories of her late husband. That night, Natsuko is masturbating in the kitchen when her son-in-law, who happened to wake up, catches her. The son-in-law starts touching Natsuko's body, seeking forbidden pleasure. Knowing it's wrong, Natsuko thinks that this way she won't feel lonely…
