NO SPOILERS :)
It's a fabtacular series/ K-Drama. The plot travels through a mesh of genres yet keeping the focus on main characters and storyline. The Drama element isn't overwhelming either and it might be a little bit difficult for people to truly understand the female lead but at the end the threads are knotted and tied into a really artistic and beautiful bow.
Why one should watch this show?
1. Deals with a variety of mental health issues.
2. The character development is amazingly gradual yet leisurely effective.
3. If you like fairy tales and want a nice realistic insight on them (whispers* then this is your go to*)
4. The most obvious reason, leads look good and have pretty much done their best to portray the characters.
5. BG scores/ OST is great.
6. Costume design : classy fancy.
7. Really heart warming, believe me!
8. Use of cast members though a lot of people have played guest role everyone's character got a fair chance.
9. The mystery element is nice. The plots are delightfully intertwined.
10. At last you might as well take some life lessons from this drama(this point may not be suitable for everyone but one might get a new perspective.)
I wrote this much but i gave 4 stars cause i really like something excruciatingly peaceful like LoveO2O(will always be the #1 to me but right after that comes psychojiman gwaenchanha)