Kore wa Zombie desu ka?

Aikawa Ayumu is an ordinary high school boy, until one day, he was murdered by a serial killer. He was then revived as a zombie by the necromancer Eucliwood Hellscythe. He begins to serve Eu as her guard but he ends up depriving the mahou shoujo Haruna of her magic power. Haruna assigns Ayumu to battle against the anti-mahou shoujo system "Megalo" in her stead.