The best part of this whole drama was Gwi and the 2nd FL. Both of them were so interesting and I wish, WISH they would've explored Gwi's backstory more because he was by far the most interesting character. While FL was already quite mid in the beginning, she quickly became annoying with her being constantly useless and a burden. At some point I couldn't stand her face anymore which always looked like she is about to cry and skipped most of her scenes - even the romance scenes. It says a lot when the lead couple are the least likeable characters in a show because they are just so damn weak and annoying. Gwi really saved the show for me - admittedly also because his visuals were just on fire.
The story itself was fine, it was just dragged for way too long. This whole drama would've worked with half as many episodes. Unlike other people have said, I don't think the show looks cheap. It has its moments but otherwise it's fine honestly. The bigger issue is by far the drama length and main leads.