Dramas with a bit of twisted romance including supernatural tricks always pique your mind.
And it's the same with this drama
The plot is fascinating.

The acting is outstanding, brilliant!
The plot starts fun and fast but then gets so slow, the plot revolves round and round the same lame thing which kills the curiosity, and it feels like a drag.
And by the time it comes to an end, you lose your patience with all the melodrama and the biggest plot twist one could expect.

This is where I feel this drama should've been 16-18 episodes only and then it would've been perfect.
This is one of those rare plots where you can experiment with pretty much anything.
I can insert tragedy , mystery , action , Noir , supernatural , historical and this script would work flawlessly.

Too bad this didn't live up to it's full potential , but then again this drama do has a special place for being spectacular.
If I had to redo the script , I would remove the Idol part and make it as an actor instead .
It will work better.