Overall it is a cute series, which deals with a serious question (franchisees), which is totally worth watching.
Originality is a key factor here.
The depiction of the fights in Episode 1 proposed points, which I had not seen elsewhere (see it for yourself), and reproposes one of the tough girls from the movie "Sunny".
The small group of girls is interesting as each one has her own personality. Also look at the initial reaction to the convenience store's friend ("an austrolopithecus? werent' they extinct?").
The series also shares several points with the series "The fiery priest" (e.g. some of the music is almost identical, and a sense of sarcasm here and there) due to the fact that both series were directed by the same person.
Finally, I loved the way they made fun of Joseon series (though I do like some series portraying Joseon), imitating the speech, announcing with loud voice and drums the arrival of the secret (some secrecy!) royal inspector, the actress getting called on the set while she was removing her Joseon zombie attire and speaking with a normal eye and one with the zombie lens.