Trinity blood the complete series

"In a distant future devastated by Armageddon, a new empire emerges from the darkness, ruled by a powerful race with unmatched strength. They are the Methuselah, but to the humans they are simply reviled as vampires. The struggle between humans and the Methuselah has raged for centuries, but now some from both sides desire a peaceful coexistence. Abel Nightlord is a Catholic priest hired by the Vatican to protect humans from vampires. But Abel isn't human; he is a vampire that preys on the blood of other vampires. And as the war intensifies, his encounter with a young human girl named Esther could very well alter the fate of the two races as Abel and Esther join forces to battle the deadliest of evils."@en
"Two races, Terran and Methuselah, human and vampire, are locked in a struggle for existence, trembling on the brink of war. Some seek the path to a peaceful coexistence, while others pursue a dangerous shift in the balance of power... And the world's enemy, Contra Mundi, is starting to move. Cooperation and goodwill between the two races may be their only chance for survival. Abel Nightroad, a touring priest for the Vatican, walks calmly where others fear to tread. A member of the formidable AX, tasked with the protection of the fragile equilibrium. Neither human nor vampire, with an awkward yet optimistic nature, this Father is a force wholly his own. When the greater threat emerges, the enemy of my enemy is my friend... And Abel Nightroad seeks a safe path for all."@en