Married for seven years, Iroha had built a modestly happy life with her husband, despite not having children. But two years ago, after failing to get a promotion, her husband began accumulating stress and gradually became possessive and controlling. As a result, Iroha was forced to quit her job and became a full-time housewife. Her outings were banned, and her only chance to leave the house was during the day while her husband was at work. One day, she confided in a junior colleague about her domestic struggles—and ended up revealing her true feelings. While she felt suffocated by her husband's control, she didn't want a divorce. Yet, continuing like this felt unbearable. Iroha realized she was seeking an affair—a convenient escape. Around this time, she learned that more and more women were developing a desire to be tied up. Encouraged by her junior colleague, and filled with a sense of taboo, Iroha made the decision to step into this unknown world. There, she discovered a new realm of sexuality where the very bondage that once tormented her now brought her liberation.