0Accused of a crime he didn't commit, Kyosuke Kamiya is sent to Purgatorium Rehabilitation Academy. Suddenly, he's surrounded by a variety of fetching lasses--each one a murderer Worse, he's famous for being the "Dozen Demon," a killer responsible for twelve deaths When the busty, gas mask-wearing beauty Renko Hikawa approaches him, the difference between death and desire becomes very narrow indeed. How is Kyosuke gonna graduate alive?