Kana is a married insurance saleswoman. Yoshimura, a chiropractor she handles as a client, is a notorious pervert who repeatedly summons her to his home. Kind and easily pressured, Kana cannot bring herself to refuse him firmly. One day she twists her ankle while returning from sales calls. When she visits Yoshimura again the next day, he notices the injury and forcefully insists on treating her. Still unaware of his obscene scheme, Kana reluctantly lies down for the session.