Investigator Yuuna becomes increasingly irritated after her comrade gets involved in a missing person case... She grasps the information that the mastermind is the evil organization Kuroshishi-kai and advances the investigation. However, she ends up getting captured. In a restrained state, her body is molested, and she is administered the ● substance they were chasing, enduring humiliation, torture... and a hell of pleasure! Yuuna desperately endures and fights with her trained body, but the unending waves of pleasure assault cause her body to react, making her cum over and over again. Yuuna surpasses her limit and goes mad with pleasure, turning into a SEX monster...
