I watched 5 episodes in bits and pieces for 2 years - and then completed the rest quickly.
How?
By forwarding every scene with the depressing female lead who has about two sorry expressions throughout and just drags the drama and every other character down with her.

So why not just dump the drama?
Because of all the stellar supporting cast and their interesting melodramas.

The poor ML.- of course his looks are off the charts, but he is so mismatched with the FL that even his noona's have more chemistry with him.

The storyline had some intriguing scenes - all well played by all the other actors.
But sadly too much emphasis on an ill-fitting female lead made this drama disappointing.