Reunited with him at a class reunion after all these years—he was her first love. Invited by him, she was enjoying a private after-party just the two of them. He forcefully took her to a hotel and made her experience tightly bound sex. That night, betraying her husband, she couldn't bear to look him in the face and kept blaming herself. Yet the feeling of ropes against her skin and the stinging pain of her buttocks being slapped gradually transformed into sweet memories she couldn't forget. As time passed, the desire from that night burned stronger and stronger, and the impulse lingering in her heart grew more intense each day.