Mystari's manga / #Supernatural(128)

Yu Mano works in a library with a bunch of otakus who like to dress up as vampires.. or atleast that's what Mano thought until one night when he has a strange encounter with the head librarian, Carvel. Not only does Mano discover that his co-workers are all real vampires, but he ends up being bitten by his boss, who seems to think that the boy strangely resembles his late wife Eve. After exchanging blood with Carvel, Mano ends up becoming a permanent resident of the vampire library.

Prequel to Hari no Hana A collection of short stories about Abe no Semei's youth

A modern-day love story between a demon king who really just wants to live a normal life and a hero who wants to conquer the world.