Darker than Black: Kuro no Keiyakusha (Darker than Black)
A new breed of covert agents known as Contractors prowl the underworld. These assassins and spies wield bizarre supernatural powers, spilling blood on both sides of the law. One of these operatives is deadlier than the rest—the masked killer BK201, the Black Reaper. His identity and intentions are unknown, but it’s clear the rules of engagement have changed.