Part-time Spy (2017) online

Jang Young-Sil (Gang Ye-Won) barely lands a job at the NSA (National Security Agency). She is hired as a contract worker to write positive comments for the NSA. Na Jung-An (Han Chae-Ah) is a detective who often uses foul language. They carry out an infiltration operation to recover money that was stolen from her boss in a voice phishing scheme