Yuri Sato is abducted by an organization conducting lewd human anatomy experiments, rendered helpless amid fear and anxiety. As she endures the men's pleasure-driven torment with desperate resistance, a vibrator applied over her underwear causes her pure, innocent body to react sensitively. Her body gradually responds to the stimulation, her most sensitive areas slowly exposed. Roughly handled as if she were a toy, her mind and body begin to change. Through this process, her innocent physique evolves into a lewd, depraved form, blossoming in a new, corrupted way.