I absolutely loved this drama. It is going to be a long review so bear with me or skip to TL;DR.

This drama deals with a forbidden love which is clear from the plot summary so if you don't like that you probably shouldn't watch it. But, please don't rate it lower just because you find it offending. Having said that, the drama never really crosses the line.

The plot is good although nothing new. The pacing is right and everything just flows smoothly. There are no misunderstandings, no forced love triangle, no noble idiocy or other drama tropes. This made the drama all the more fun to watch. However, the premise of skating and the advertisement company is laid out in much detail to the point that some would find it boring especially in the first half. I still loved it but found myself using the fast-forward a few times. The dialogs are witty and interaction between the couples (?) are extremely fun to watch especially Haru / Hwal and Hae-yoon / Sang-hee.

Though it deals with serious issues, it's a very light-hearted watch.

I love the cast, the fact that they chose (except for one or two, maybe) pretty normal-looking but incredibly talented people. The chemistry was one of the best if not the best I've seen.

They chose a more "normal" styled cinematography that gave it a realistic vibe and not trying to show us some romanticized, hyper-realistic world.

The OST was second to none. Unlike some dramas that try to use "loud" overpowering music and songs, this drama chose to use soft songs (many of them English or part-English). My favorite is "Little Tiny Baby" by Zitten which I find very melodious and catchy.

The ending was good a bit anti-climatic and vague. It wasn't open-ended but the little vagueness actually made the it more impressive.

The rewatch value for me is high because I loved the interaction between the characters and I found myself immediately re-watching scenes.

TL;DR: I loved this drama and found it to be very refreshing. If you don't mind the controversial plot or you're open-minded enough to not judge, you might thoroughly enjoy this drama. Some people might have to use fast-forward as it might get a bit boring sometimes (especially with the details). It has great characters, chemistry ans OST.