After nine years of marriage, Aya lived a quiet life with her husband, though they never had children. However, a few years ago, her husband became frustrated after failing to get a promotion at work, and gradually began to control her. She was forced to quit her job and became a full-time housewife, with strict limits on going out—her only relief being brief outings during the day while her husband was at work. One day, she confided in a junior colleague about her marital struggles, and was introduced to a certain website. While she felt stressed by her husband's control, she didn't want a divorce. Yet, continuing like this felt suffocating. Aya began seeking an affair of convenience. Around that time, she learned that more and more women were developing a desire to be tied up. Encouraged by her junior, she stepped—despite feelings of guilt—into this unknown world. There, a new realm awaited her. Aya, who had long suffered under restriction, would discover a new sexual liberation through being bound.