Mrs. Fujiwara is fed up with her husband’s constant cheating. She had always been devoted to him, but every newly discovered affair chipped away at her love. To ease her loneliness, she began attending drinking parties and learned the thrill of one-night encounters herself. Eventually she met a man whose body was perfectly compatible with hers and fell deeply into an affair. Now the two set off on a hot-spring trip overflowing with forbidden desire.