Tsubaki who lived a lonely life alone while her husband was away on a business trip to a rural area. At that time, her newly-married daughter and her husband were worried and decided to live together. Tsubaki's loneliness has eased considerably, but she can't control the pain in her body. One night, when she happened to witness her son-in-law, Yasuo masturbating, Tsubaki lost her words and reason because of the extra big cock, and invited him by all means. Unable to resist his mother-in-law's provocative eros, Yasuo becomes more and more addicted to her...
