Black Bullet, Vol. 1 (Novel)

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.