In a certain research institute, there was a researcher who was a little, just a little, unusual. Brilliant intellect, the best in Japan when it came to pharmaceuticals...? No, the best in the world...? But he had one thing going for him: a strong hatred for women and a fierce desire for conquest. Yes, that's the story of Dr. Cruel. Dr. Cruel, a mad torture research institute, constantly felt inferior to every woman in the world and plotted to one day conquer them all. The super-powerful aphrodisiac he had been developing was finally complete, and he joined forces with the evil organization, the Black Lion Society, to take on arrogant women. One day, the doctor encountered a sassy beautiful girl named Shizune in town, restrained her, and took her to a certain place for an experiment... Shizune, unable to move, was forced to drink the super-powerful aphrodisiac developed by the doctor! Faced with the super-powerful aphrodisiac, Shizune's body couldn't resist and reacted, and she was further toyed with and abused by the men of the Black Lion Society, enveloped in tremendous pleasure, and her sense of self collapsed! What fate awaits Shizune, the beautiful girl who has gone too far and surpassed her limits?!