first of all I would like to suggest y'all to watch the movie version because the drama version in 26 some episodes is confusing and draggy. You'd be disappointed if you had expected a lot of lovey-dovey scenes but overall it was quite nice and entertaining to watch. If you are watching it to cut and analyze every little bits of it then drop it. It would be more enjoyable to just enjoy the flow.
It is the story in which the FL gets stuck in the script of a drama in which she's a supporting character. She wakes up as her character and a series of events takes place. It gets a little messy in the second half that is why I strongly suggest the almost 4 hour long movie version.