I agree with another reviewer about the murder mystery disappearing into a rom com. The first two episodes were amazing and this show would have been so amazing if they had stayed on that trajectory. Instead of keeping with the thriller vibe they turned it into a slow rom com. I can't stand it when dramas do this, a lot of dramas start with an amazing first 1 or 2 episodes like they're just trying to hook you, and then everything changes to something totally different. It's to the point that I can sometimes predict if the show is going to start slow down, and I usually prefer dramas that start slow and build up over time instead. This drama was one of the worst I've seen as far as that's concerned, the first 2 episodes are nothing like the rest of the show. Itaewon Class is another one off the top of my head that did this.
I wish 2ML had come back to cause trouble, unknown to everyone if he was the twin or not, while also seducing FL in the meantime and maybe ML tries to keep her from him. Kinda like how it was going down in the first few episodes, but instead they ended it abruptly and then the rom com started and we got to see the two going to the beach, sitting and talking, etc...nothing like the thriller we were given a taste of.
It does have good things about it. The cinematography for one is simply amazing here and worth the praise. It's too bad they totally lost me with the plot.