I became horny from my mother-in-law's healing smile and too erotic body, who came to Tokyo from my wife's parents' house... My wife is not home, and a great erotic opportunity arrives with just my mother-in-law!! My mother-in-law is still young and sexy, and she must be absolutely frustrated. It's wrong, but... will I be a substitute for my daughter? A lustful mother-in-law and son-in-law begin a secret incestuous life within the family!!