A young girl named Aoi searches desperately through the city for her friends, who have been vanishing one after another. Exhausted, she fiddles with her phone when suddenly she receives a message with crucial information, prompting her to rush off to save them. Driven solely by the desire to rescue her comrades, Aoi storms the office of the Black Lion Society—only to be forced by the men to drink a potent aphrodisiac-laced beverage, causing her to lose consciousness. When she awakens, she finds herself bound and trapped in a hell of relentless pleasure torture. As she struggles to resist, her body and mind fall under the control of her long-dormant feminine instincts, making it nearly impossible to fight back against overwhelming ecstasy. What exactly is this ultimate pleasure torture, the most intense ever devised? The fate of the beautiful warrior girl Aoi hangs in the balance.