From Kodansha USA: Its a day like any other, and high school students Ie and Kazu are on the bus home from school when, suddenly, it floods with a mysterious gas. The pair pass out and wake up to find themselves aboard a truck packed full of human bodies. Theyre surrounded by rows of frozen corpses â?¦ and a staff of living human beings sawing them into pieces. Where are they, and how can they escape from this nightmare?