If you're looking for manga similar to Watakushi to Kowareta Kyuuketsuki, you might like these titles.
High school student Asahi is forced to provide blood to a childlike vampire Hikato, and becomes his "temporary" mother, until he reverts to his original self. When Asahi finds out that Hikato stayed behind to protect the human world, how will her thoughts towards him change….!?
Honey Blood Tale 0 is where Hinata and Junya’s love story originally began. In addition to the one-shot chapters that made Honey Blood’s serialization possible, this volume contains two bonus short stories from the author!
Maira is a half-vampire, and sworn enemy of vampires that use humans as lifestock. She's trying to find a way to repay Kyousuke for donating his blood for her to fight her battles.
One day, Kirie, the daughter of a count's family, found a beautiful, blue-eyed man collapsed in the street. What's more, when he woke up, he seemed to have lost his memory. But, with his blue eyes and pale skin, could he be the rumored "blood-sucking demon"?
When a girl at Hinata Sorazono’s school is attacked by what seems to be a bloodsucking vampire, everyone is on edge and wonders who’s next. Hinata refuses to believe that vampires even exist, but then she meets her new neighbor, Junya Tokinaga, the author of an incredibly popular vampire romance novel. Dressed in a kimono with an old-world air about him, Junya has a taste of Hinata’s blood and tells her it’s sweet... Hinata can’t help but be drawn to Junya, but could it be that he’s actually a vampire—and worse yet, the culprit behind the attacks?!
RH Plus follows the lives of four male vampires who live together in a mansion: the building manager Kiyoi who is nearly 100 years old, college junior Masakazu, and high school freshmen Akira and Ageha.
Karl is a holy vampire hunter from an infamous Van Helsing family…who’s been turned into a vampire himself. Though the evil Elliot now knows the taste of his mortal blood, Karl has somehow retained the faintest sliver of his humanity. How long will Karl’s tortured soul continue to waver between shadow and light? And are he and Elliot doomed to try to destroy one another…for eternity?