In 20XX, soaring crime has left prisons permanently overcrowded. The government turns to privatization and introduces a system that lets prisons control, exploit, and enslave their inmates. Rehabilitation is abandoned, and male prisoners are conditioned with aphrodisiacs and commands into obedient sex toys. At one such private prison, the cold-blooded guard Ao Wakasaki strips inmates of their rights through arbitrary orders and punishment—until the prisoners begin preparing their revenge.