Saigo no Negai ni Tsuki ga Naku

Overview

Childhood friends Shingetsu and Asahi are attending a festival when an angel appears. The angel smiles, unfurls her bloodstained wings, then rips into the throats of onlookers. As the friends’ peaceful island home becomes a slaughterhouse, they realize the angel’s true identity—she’s a vampire! Shingetsu soon learns that he’s one of the Seven Luminaries who seek to eliminate the vampiric threat. Can he wield his newfound power to save humanity from a bitter, bloody end? (Source: Seven Seas Entertainment)

Source: AniList