Doomsday: My Girlfriend of the Zombie King

The apocalypse broke out, zombies swept the world, and various creatures emerged one after another. Mysterious stone tablets appeared in various places. They were extremely strong and could not be destroyed. Gradually, humans discovered that the stone tablet was like an unmanned vending machine that could provide various commodities, from food to weapons, and even special potions that could allow humans to evolve. The exchange items were special crystals produced from the heads of animals turned into zombies. This is how humans began to evolve. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.