I'm Pretending to Be a Zombie in the Apocalypse

In the apocalypse 50 years later, the survivors have established bases in the outside world, while the zombies have been living in the occupied areas for a long time. My father was a transport worker between the fall point and the base. He ran a small pawn shop and brought back gadgets that the people needed from time to time. A family accident forced my father and I to do more dangerous work: going deep into the occupied areas to find documents and things that the nobles needed. As the days passed, as I played the role of a "spy" within the zombies one after another, I gradually began to doubt whether "surviving" was really that good.