A man named 'Hoshino' had been traumatized by a past case where an innocent person was caught in a decoy investigation. To overcome his past self, he decided to become a decoy. He disguised himself and rode the same train every day but ended up being preyed upon sexually by perverts, gang-raped and left in tatters, becoming an outlet for molesters' sexual desires! They split into roles: wall guy, cameraman, and molester, using aphrodisiacs to cleverly trap him in a group molestation. In the confined space of the train, he loses his freedom, is restrained, forced into fellatio, gang-raped... acts of utter depravity are taking place.
