Blood-over- (2006)

While fighting demons during an outbreak of monsters and supernatural forces, Shou, a demon hunter who wields the power the absorb demon's souls, confronts a shinigami who overpowered Shou and stolen her soul. Aided by house maid, the Gatling gun-wielding Akari, they must track down the shinigami to reclaim Shou's human soul before her demonic blood lust consumes her.