If you like a persistent, annoying and a "door mat" kind of a girl who keeps following a guy just because of a "crush" for four years in spite of the guy not even acknowledging her *literally*, then and only then will u enjoy this show.
I did not like it much but it became better towards the end... If u have no better option, you can watch this kdrama.
Also an important thing, the female lead is literally the dumbest person u could find on Earth... Very annoying, permanently sulking about every thing and toooo persistent! Still, there is a large percentage of people who like this kdrama I wonder why... So watch it if you'd like to.