Moon and Blood Vol. 2 (manga)

He may be an aloof loner, but it looks like Kai is getting mighty comfy in his role as the houseguest at Sayaka’s family home. He may even be picking up a few friends along the way and is actually having some fun! Of course, there’s always his sempai Ai, trying to convince him to return to the life they once lived and then there’s Natsuki, Sayaka’s brother, who keep trying to out him as a vampire!