Nao grew up in an ordinary family, and her first love and sexual experience were when she was in high school. After graduating from junior college, she got a job and married her boyfriend a few years later. Nao was living a happy life as a full-time housewife, but her life with her husband hadn't changed much, and their relationship had become one in which they hardly had sex at all. A housewife friend she had become close with at her part-time job asked her if she wanted to meet her sex friend friend. Nao was hesitant, but was forced to go and meet the man. That was the beginning of her hell of pleasure...