Yu Okano 
The Unwanted Undead Adventurer (Manga) Volume 7 [EPUB ebook] 

Thanks to Laura Latuule, Rentt achieves a new form of evolution and is reborn as a vampire. He returns to Maalt’s Second Orphanage to check on Sister Lillian’s health and to ask if Lorraine and he could take Alize on as an apprentice. However, little does he know that, at the same time, two new people are approaching Maalt. One is a saint of the Church of Lobelia, and the other is…a vampire hunter?! Together, they just may spell the end of Rentt’s undead life!