Unsatisfied with her sex life with her husband, Hikaru decides to cheat on him with a man she met on a secret dating app. Interested in SM, she readily accepts the man's rope fetish, and though she hesitates, becomes addicted to the pleasure she's experienced for the first time. Since then, she has been meeting with the man secretly, lying to her husband, and getting tied up, tortured, and violated, enjoying the thrill of the pleasure. One day, her husband, drunk after a night out,...