Help pls

Help me find this manhwa. It's an action story and the mc is a girl. I remember that there was no romance(?). Basically, it's about some dystopian world, like people are divided, and then mc belongs to those of the lowest and it's a crime to actually help these kind of people. And in order to not get hunted and be deemed as criminal, you have to pass some exam. Like you gotta be a delivery man or something like that. I dunno I forgot, I have only read a few chaps. I accidentally uninstalled brave so now I lost all the tabs