Labyrinth City Asylum

Iris Chromel, the Saint of the Church, became a vampire in the battle with the True Ancestor. She is in danger of being expelled from her position as a saint because she has become a demon. One day, she hears that there is a holy relic beneath the labyrinth city that can completely seal away the power of vampires, so she heads to the labyrinth city... Will she be able to overcome the dungeon and return to being human?