Miori is a slender young wife living peacefully with her older husband. Her brother-in-law, a photographer, has returned from overseas for the first time in a long while and is staying with her for a week. Due to a trivial incident, Miori becomes a model for the photo. As her photographs are taken, the atmosphere becomes suspicious and she is photographed in bondage. At night, she sneaks out of bed and masturbates alone with her body tied up. Her brother-in-law sees her and trains her in bondage. She is excited by the thrill and pleasure of being trained in bondage out of her husband's sight. Miori goes from being a slave to rope to being a slave to her brother-in-law.