This is a funny and romantic short show. The storyline might not be new and refreshing, but it is entertaining.
Character wise:
FL is the author of a novel. She is smart and resourceful. She somehow enters the novel as a side character when she wants to change the course of the story.
ML is the hero in the novel and is set to marry a scheming girl. He is a calm, collected man who is good at martial arts. The appearance of FL turns his world upside down.
The side characters are really interesting and fun to watch.
Acting wise this is pretty good given the limited timeframe and comical aspect.
So, if you want something short and sweet, this is well worth watching.