At first glance, Kokoro appears to be a strong-willed, attractive woman drinking alone at a bar when a suspicious man approaches her and buys her a drink. However, as soon as she drinks, she loses consciousness and is taken away. When she wakes up, she finds herself in a room she's never seen before, tied up with her hands behind her back, and surrounded by suspicious men. They are members of the "Female Torture Laboratory." They don't choose their means; they simply play with their targets' bodies, using every means possible to torture them for pleasure, and drag them into a world of pleasure they've never experienced before. In a sense, they are a despicable group. Kokoro is actually their test subject and is tortured. Although she resists verbally, her body becomes hypersensitive due to the effects of the aphrodisiac, and her clitoral penis becomes rock hard in no time! She climaxes over and over again, even with her asshole! Her strong words of resistance gradually turn into cries of begging for forgiveness and screams of pleasure and climax...