Is This a Zombie?

Is This a Zombie? also known as Korezom is a Japanese light novel serie. Ayumu Aikawa is a zombie who was once an ordinary high schooler resurrected by a necromancer named Eucliwood Hellscythe after being murdered by a serial killer. As he tries to make the best of his undead life, he encounters a Masō-Shōjo (魔装少女, lit. Magical Garment Girl, a pun on "mahō shōjo", meaning magical girl) named Haruna and inadvertently takes her magic powers, being forced to become a Masō-Shōjo (and thereby crossdress) in the process. With Eucliwood, Haruna, and a vampire ninja named Seraphim living with him, Ayumu helps battle demons known as Megalos while trying to figure out the mystery behind his own death.