Yuka Hoshi, a beautiful housewife with an outstanding figure, lives with her hardworking husband. One day, her husband's older brother Futoshi comes to Tokyo on business from his parents' home. Yuka eagerly welcomes her brother-in-law, who has come to visit her house for the first time in a long time, and takes good care of him. However, although he may appear innocent at first glance, Futoshi is actually a very perverted man, and his eyes are fixed on the curves of his younger brother's wife Yuka, who lives in the city and has an outstanding figure...!