Sakura Miura lived peacefully with her kind and loving husband until her father-in-law injured his back, forcing the couple to care for him for about a week. One day, she accepted a cup of tea from him and, after drinking it, suddenly felt her entire body go numb and paralyzed. Helpless, she was taken by her father-in-law, overwhelmed by pleasures she had never experienced before. Her body began moving on its own, hips swaying uncontrollably as she was pulled into a whirlpool of ecstasy. Losing all rational thought, she surrendered completely to sensation, driven repeatedly to climax. The scene added a new, forbidden dimension to their familial bond, as his mysterious dominance over her became absolute.