Asako Chouoka was at the forefront of an investigation to bust the vicious drug trafficking organization, "Kokuran-kai." One day, she heads to a dilapidated building based on a tip-off. However, it was a trap set by Kokuran-kai from the beginning to capture Asako. She puts on a brave front in the face of criminals, but her reason starts to fade as she is overwhelmed with pleasure. Then, the "sex beast" within her awakens.
