It's the End of the World, You Still Want Me to Be an Undercover Agent?

Xin Ya, who traveled through a different world, was accidentally selected as an undercover agent and embarked on the road of no return. In this troubled world, it is not a good thing to be a pawn that can be discarded at any time. Let's see how he mediates among various forces and becomes the well-deserved king of undercovers!