Attack on Titan: Zombie Apocalypse

In the confined hell of the walls, titans have almost killed off humanity. But we fought against the titans and almost won. But another threat has came to threaten us. Zombies! Those were the two things that a boy named Eren Jaeger hated the most and was determined of killing every last one of them. But after he cured a zombie when it killed his mother and father, his goal changed from killing zombies to curing them.