Aikawa Ayumu is a normal high-school boy. One day he is killed by a serial killer and revived as a zombie by a necromancer, Eucliwood Hellscythe. He starts to serve Eu as her guard but he happens to deprive a mahoushoujo Haruna of her magic power. Haruna orders Ayumu to fight against anti-mahou shoujo system "Megalo" in her place.
The following are links to AnimeNewsNetwork for the anime:
[Season 1](https://www.animenewsnetwork.com/encyclopedia/anime.php?id=11752)
[Season 2](https://www.animenewsnetwork.com/encyclopedia/anime.php?id=13782)
[Side Story (OAV)](https://www.animenewsnetwork.com/encyclopedia/anime.php?id=15521)
