Mystari's manga / #Library(2)

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.

Because of his looks, Seiichi was treated as the "School Prince" whom everyone adored. Since he didn't want the girls to be disappointed he decided to act the part. To conceal his true nature, he made sure to politely reject all the girls' confessions. But then one day, some random boy suddenly confesses his love for him, will he still be the gentle prince everyone's in love with?