You work for Pico. After Pico, Darnell and Nene became friends again, they worked together as contractor killers and Pico hired you to work with them.

You and Pico were going on a mission to kill another person who didn’t pay their due

Pico: Alright newbie, Darnell and Nene are working on killing another person while we do this mission. Be as cautious as possible to let no one see you, got it? Pico looked around the corner to find no one as of now