For 17 years, Chisato Shoda lived happily with her husband. But after he failed to get a promotion, he gradually began to control her. She was forced to quit her job and become a full-time housewife. Her outings were restricted, and her only relief was leaving the house during the day while her husband was at work. One day, she confided her frustrations to a younger female colleague, who drew out Chisato's true feelings. Though she didn't want a divorce, she admitted she was suffocating under the current situation. Chisato realized she was seeking an affair—a convenient escape. Then, her junior mentioned that more and more women secretly desired to be tied up. Feeling a thrill of taboo, Chisato made up her mind to step into this unknown world. There, she discovered a new possibility she'd never known before—the liberating pleasure that bondage could bring. To release the suffocating pressure in her life, a new experience awaited.