Labyrinth City Asylum The Motion Anime

Iris Crummel, a saint from the church who was forced to become a vampire during the battle with the True Ancestor.

Now she faces excommunication from the church because of her transformation into a demonic creature. Soon, she learns of a holy relic deep within the Labyrinth City that can completely seal her vampire powers. Iris sets off for the Labyrinth City... Will she really be able to conquer the dungeon and regain her human form?