Reincarnation of the last hope

Its a story about the boy name Aaron how he gets reincarnated before the apocalypse how he can prevent it from destroying the human. undead slowly walking towards us as a human race, to deserve this type of punishment. City had gone first. It was terrible; thousands of them.  The undead, reeking like rotten meat, had came out of every place thinkable. The ocean, the Bay, the rivers, the hospitals. Everywhere. They started with the animals, and then went after the humans. All the town and cities was gone in hours. They started moving, and killing whatever they wanted. There will be 10-12 Chapter a week