“In a dark and distant future, Armageddon has given rise to the fabled Second Moon – and a perpetual war between the vampires and the humans! Esther is a nun in the city of Istavan. When she crosses paths with Abel Nightroad, a priest sent from the Vatican to combat the local order of vampires, the pair forms a holy alliance to battle the most evil of threats.”

Article:https://www.animenewsnetwork.com/news/2018-03-29/trinity-blood-manga-series-ends-on-april-24/.129664

As always thank you for reading.