In order to capture the vampire lurking in the school, Mana the exorcist transfers in. Okamoto-kun, the vampire in question, is one who has changed with the times and gets by on blood transfusions! Mana is left dumbfounded by the carefree, easy-going vampire! An eagerly anticipated romantic school comedy released by a new author at Sylph.
Source: Nevermore Scans
Hiiro Ouji is finished and has 3 Volumes and 17 Chapters. It is also Known as: 緋色王子, Scarlet Prince
Genres: Comedy, School Life, Vampire, Shoujo Ai, Romance
Top Manga Like Hiiro Ouji [2022 List]
1. Junketsu + Kareshi

Kana Takachiho, despite her disadvantages, is a pretty nice girl. She’s friendly, outgoing, and used to be good at sports until she was injured in a freak accident, losing the scholarship keeping her in school, and earning her the disdain of her fellow classmates. Oh, and her childhood friend and boyfriend, Aki, just so happens to be a vampire who turned her into his slave after drinking her blood on their first date. But Aki’s not just any vampire; he’s a Pureblood, and he’s participating in a game to find the seven “Stigmas” in order to wake his twin brother and Kana’s other childhood friend, Eriya, from his mysterious slumber…
Source: Turtle Paradise
He's My Only Vampire is finished and has 0 Volumes and 47 Chapters. It is also Known as: 純血+彼氏, Pureblood + Boyfriend