Unable to get a hotel room during his business trip, he decided to stay at his son's house. His son's wife, Miyabi, has a lovely smile, is tall and has big breasts, making her very sexy. Even though he knows it's wrong, he can't help but fantasize about his son's wife's lewd behavior. His wife masturbates in a showy manner, and gives him a blowjob in the bath, and the father-in-law's fantasies grow and grow...