Basically, the show is very interesting. It has an overall plot that you can follow and makes sense, but the premise is totally impossible. Still, the acting is superb. The characters felt real and I really enjoyed it. However, trying to make the pieces fit when the premise is so unbelievably ridiculous is a little hard to do. OST was whatever, I didnt love or hate, but it didn't distract, so it's good. Would watch again, but must suspend my disbelief in order to enjoy it.

With spoilers: The premise of the show is that the ML of the show was somehow able to have surgery that altered his physical appearance so he now looks like a foreign man who had passed away in the hospital where the ML was recovering. He and his lover (2nd ML) having been nearly killed by a criminal group and his lover now believing he is dead, the ML wants to go back to right wrongs and uses surgery to further this end. The plastic surgery isn't impossible, but this level of plastic surgery is improbable if not impossible. For example, the ML went from being taller and having more narrow shoulders to shorter with wider shoulders (based on my perception, since they were never actually in the same scene together). Also skin color over his whole body changed from darker to lighter. His teeth, jaw shape, and eyes changed. His hair changed. His tone of voice changed. His body type and his face changed. He was unrecognizable, not just from a face point of view but even the way he walked and held himself. So the premise that he was able to get plastic surgery and return to stop the criminal group and see his lover again is just too ridiculous. If they had wanted it to be more believable, they should have at least picked actors who had some overall similarities. Because you start out watching the ML looking so completely different from his original self, it's hard to imagine that he is the same person. The 2nd ML somehow was able to figure it out though, which makes no sense, but they based it on other things besides physical appearance. An emotional connection, i guess. Once you have figured out that the ML is supposed to be the same man as the 2nd ML was dating before, you might feel a little cheated. Like they just thought I was so stupid that I would accept all of these changes as being not only possible but easy to accomplish? It's kind of insulting the intelligence of their audience. If you can live through that annoyance, and as I said before, suspend your disbelief with the amount of physical change that had to be done to make this even possible, you will probably enjoy the show. I rated it fairly well, because I think it was interesting, even if it was pretty much impossible outside of a fantasy series.