Married for seven years. Although their relationship is good, Aki, a beautiful wife, is frustrated by her husband's bland and short sex. While masturbating to relieve her frustration, the embarrassing scene is witnessed by a man who was asked to manage the apartment complex. Feeling embarrassed, she tries to avoid the man, but before long, she begins to consult him about her sexual problems... For some reason, the two are attracted to each other, and because they are both married, they are tentative at first, but later they become involved in an affair so intense that they are covered in sweat...