Company president Kanna Misaki is a sex addict who tests suspicious erection drugs on men. Investigators lure her out with a supposed new product called Super Erection Drug, and transgender special agent Mumu Kondo is ordered to catch the deal in progress. But the women know about the operation and capture Mumu instead, forcing her to become the drug's test subject. Artificially driven into intense arousal, she can no longer resist the pleasure and submits to their obscene experiments.