A mother who spends a good time with her daughter and her husband who have lived together to save money for their own home. However, her husband, who is her age, has decreased libido, and she continues her lonely days to console herself. At that time, Kyou, who was secretly watching her masturbating, was fascinated by her son-in-law, Koichi, who had a rare big cock. During this time, he set up a violent temptation for him. Unable to resist her mother-in-law's foolishness, Koichi, who was led to climax many times, could not live without her.
