"The world has already ended. The future--where a terrible battle against a parasitic virus called "Gastrea" has been fought...and lost. Humanity is cornered and lives in despair. Rentaro and Enju face constant danger in their work as a team of anti-Gastrea specialists known as "civil security officers." As if the daily fight against oblivion weren't enough, they soon face a threat that could destroy all of Tokyo..." -- Unedited summary from the book.

Translated from the Japansese. "First published in Japan in 2011 by Kadokawa Corporation, Tokyo" -- Title page verso.