In the Doomsday System, I Rely on Picking up Zombies to Rebuild My Home

In her last life, she was bitten by zombies and died. She was accidentally bound to the system and was reborn. One person has a long way to go on the road to saving mankind. System: Ask the host to pull out the zombies as soon as possible to complete the mission and save humanity. Han Mo: I'm already dead, can you let me go and be reincarnated? Find whomever you like to do the task. System: Humanity is extinct, why are you reincarnated? Han Mo: "I want to be a dog." System...