I Have Become a Zombie. Why Did You Come to the System?

[Doomsday + system + no cp + the protagonist is a zombie + legion + evolver + no superpowers] The melting of glaciers caused by global warming has released ancient viruses frozen in ice, which have rapidly spread throughout the world. Liu Tian, ​​an ordinary takeaway boy, was infected with a deadly virus. His body gradually changed and turned into a conscious zombie. At this moment, a mysterious system came to him. Liu Tian: "System, I have turned into a zombie, why did you come here?" Since then, a zombie 6 has appeared among the zombies, and the senior leader of the human front is actually a zombie. [The early part of this article was a bit delayed, mainly to prepare the ground for what will follow. After Chapter 60, he began to enter the human world as an undercover agent and began his path of lurking. ]