Kunimi, who got married just last year, had dreamed of a happy married life. But her husband's attitude suddenly changed, leaving her feeling lonely day after day. Before marriage, they used to go out together on weekends and spent a lot of time together. Now, however, her husband leaves early in the morning for fishing every weekend and when he returns home, they barely spend time together. With communication completely broken down, she falls into sexual frustration. Seeking to ease her loneliness, she contacts her ex-boyfriend and begins an affair. Having sex with a man other than her husband for the first time in a while brings new excitement, and she becomes completely addicted to the sensation. From this first act of infidelity, her repressed desires awaken, gradually driving her toward new, deeper cravings.