Itsuwaru Kami no Sniper

What this scope isolates from the world, is what i'll protect. The dead revives and assaults the living. That is the phenomenon that tore apart the world in the blink of an eye. The name of these corpses were 'Revenant'. And those who oppose them were the 'Burial Bureau', specialists who were practitioners of enhanced abilities not unsimilar to those of the Revenant. When genius sniper Suiga, somebody who had lost his ability to peer through a scope due to trauma, meets Zaisha, a girl who holds a powerful weapon within her body, Suiga forms a contract and becomes a member of the Burial Bureau. However, the weapon he was entrusted with, was none other than the one weapon he could no longer use; a sniper... (translated from amazon)