This is a fable, more than a show. It's simply adorable (though I was more interested in the main storyline than the subplots).
The all-star cast is incredible, too (even secondary characters are played by popular actors).
MVP, though, in my humble opinion is Jun Ji Hyun, an amazing actress: beautiful, classy and, most of all, capable of giving great performances regardless of the material she's given, from drama to comedy in a bit!
Strongly suggested to whoever is looking for something funny, deep and romantic at the same time, with a supernatural touch.