In the End of the World, If You Upgrade, Give It to Your Wife

(Doomsday + invincibility + many beauties + decisiveness + cool writing + unintelligent system) At the end of the world, people were killed by the Virgin and bitten by zombies. When you are about to become a zombie, you will get a system, and you will get a companion every ten levels in the future. The partner has special powers and is stronger than the other. From now on, he will have no worries about food and clothing, and he will make babies in the last days.