Is This a Zombie?

Ayumu Aikawa is a 16-year-old high school student who is tragically murdered while investigating a suspicious house. However, he soon awakens next to a strange armored girl called Eucliwood Hellscythe. She reveals herself to be a necromancer who has revived Ayumu, consequently turning him into a zombie! Now immortal, Ayumu sets out to hunt down his killer. One day, while searching in a cemetery, he encounters a boisterous young girl named Haruna, who is fighting a bear with a chainsaw while dr...