Her 52-year-old husband, 16 years younger than her, is a department manager and rarely at home on his days off, going out to play golf for business purposes. In an attempt to impress her husband, she started giving him golf lessons. She has been giving him lessons once or twice a week for the past three years. Two years ago, a young coach joined her, and after more than four years of not having sex, Mari began to think she wanted to have sex with a strong man like her coach. Then, after stopping at a video rental store on her way home from lessons, she saw an adult video featuring a married woman and began to want to be fulfilled by it herself...