Kana lives with her husband and adoptive father. She and her husband have no sexual intercourse, leading a mundane daily life. However, her adoptive father knows Kana's secret: she frequently masturbates and is fascinated by images of bondage. He plans to make her his possession. One day, his strategy catches Kana off guard, preventing her from going to the toilet, resulting in urinary incontinence. He pretends to care for her, but actually forces himself on her, saying, "You actually like it, don't you?" Then he takes out a rope…