This is the one drama that I absolutely loved everything about!
I just could not stop watching. The story line was unique . I haven't seen a show that had this kind of supernatural concept. I believe that is what really enthralled me to keep up with the show. I just had to see "why?"

The characters. What can I say? It was love at first song . The female lead is awesome and her singing just got me I could watch her sing throughout the complete show. I like she spunky attitude when she was near the main lead at first. I loved her cutthroat techniques to get close to him.
The main lead, for some reason I just liked him. Maybe because I found him a little awkward and I enjoyed that.

Music was hands down amazing. I am a big musical junkie so this really did it for me.

Re-watch value. Yes yes and more yes. I haven't had a chance to re-watch this yet but it definitely on the top of my list.