A married woman takes a housekeeping job at her husband’s boss Kudo’s home and accidentally sees his wife Akane tied up. The moment Kudo realizes his bondage fetish has been discovered, he binds her entire body tightly with hemp rope. Pleasure emerges through the discomfort and spreads across her body, awakening a new craving. Unable to tell her husband, she is forced into a secret sex-slave contract, and the teasing pressure of the rope gradually makes her completely addicted to bondage.