Molestation cases are occurring frequently on a certain train line. Strangely, none of the victims have come forward, making the investigation difficult. Meanwhile, T, a former pharmaceutical company researcher, emerges as a suspect. To get to the bottom of the case, elite investigator Shiramine is deployed in a sting operation. The sting operation is successful, and T begins to grope Shiramine's body. However, Shiramine loses himself in the pleasure that seems to consume his entire body...