The intense battle of pleasure between man and woman begins anew! The Female Body Torture Research Institute, led by Tsujimaru, makes its return, armed with new sex devices and advanced torture techniques, unleashing even more brutal and exhilarating methods. Megumi Asuka, an investigator from NSI (National Security Investigation Agency), learns that her friend Tomoko Tomioka has been captured by the Institute and launches a solo investigation. Known as "Devil Megumi" and "Man-Eater," Megumi is a fierce and sexually dominant expert. It's only a matter of time before she becomes the Institute's next target.