After 16 years of marriage, Rieko felt suffocated by her husband's possessiveness. Though childless, they had lived a relatively happy life together. But in recent years, her husband's stress from corporate promotion struggles had intensified, leading him to increasingly control Rieko. Eventually, she was forced to quit her job and become a full-time housewife. Her outings were restricted, and her only relief came during the daytime hours when her husband was at work. One day, she confided in a younger colleague about her marital troubles and was introduced to a certain website. While she didn't want to divorce, the oppressive control was making it hard to breathe. Rieko began seeking an affair with convenient terms. Around that time, she learned that more women were expressing a desire to be tied up. Encouraged by her colleague and trembling with forbidden excitement, she stepped into this unknown world. Before her unfolded a new realm she had unknowingly longed for—a world where, despite years of suffering under control, she could finally liberate her sexuality through bondage.