I just finished watching this drama and I am left somehow disappointed. Despite my disappointment I did rate some high scores because the music was good and the acting was not bad. I didn't score the story line to high because this is what brings the disappointment for me. The idea for the drama its not bad unfortunately for me the story was a bit boring at times and I found myself speeding through conversations. Like a lot of the conversations between the police officers when talking about the cases I personally found it a bit too long so I had to skip through. Then it was the way of solving the crimes. It felt like they were starting different investigations that had nothing to do with each other and all of a sudden they start connecting them all in one investigations. And one that comes to mind right now is when Oh Man Soo in the detective's Han basement started investigating some files from his insurance company that had nothing to do with the police investigation so far, and then leaves the door open and detective Na Gwang Gyun comes and sees the files and some papers and he start intertwining that with his investigation. How do you connect the two where up to that point had no connection? At times it felt like the investigation was not clearing anything, actually it was getting deeper and more complicated and more twisted which will not be bad if the viewer will not get the feeling that its just a hot mess that will never get anywhere and even they don't know anymore. The confusion doesn't stop here. I also had an issues with how the ML role was written at times. They portrait him to be this bad ass, cold, emotionless, super human, super powers entity but then he gets bit up some times like he was nothing and I'm talking in particular about scared face which was an old man but he was able to bit all this much younger and stronger guys like even Ha Ram's father. For me personally he got on with his bad deeds for too long. And once you make me see this supranatural entity with all this power and than you show me he got bit up by an old man it doesn't do it. As some people might say he was becoming more human and that is why he was not always succeeding in his fights, I will say that becoming more human was ok to stop him from teleporting and to start making him have feelings but should have not interfere with his strength. I did like the part where he start having feelings. I enjoyed that very much. I did enjoy the comedic parts through the series and I did enjoy Black's two side kicks. I loved them. But one of the biggest disappointment comes towards the end. The series leaves the viewers with more questions than answers. Black says he will stay to leave as a human next to Ha Ram but then everything he does and every action he takes is to prepare for not coming back. Well one thing I hate in life are liars and he was just that by doing that. Don't say you gonna stay by a person but then you end up leaving. That is BS. Than he asked for the highest level of punishment which meant he was going to be erased from everybody's memories which meant there was never a Kim Joon nor anything ever associated with him. You have then Ha Ram go on with her life. Also there is a mention about a husband who nobody knows and there is no mention of who that was, not even a picture shown somewhere around the house, and you have somebody telling the grim riper story which will be fine as a folkloric story but unfortunately it gets even more confusing. So when the red bracelet appeared at the end how was that possible since he was not supposed to exist, which meant she did not make the bracelet for him because Kim Joon did not existed, so there was supposed to be no bracelet. Then she gets the bracelet and gets her memories back. What memories of something or somebody that didn't exist? And if it did exist was there a previous life, a parallel life or what life because the one she was living and got old in it he didn't exist? Then again I am at it, if he never existed, why did you had him come to take her soul? I don't get it? There are still so many questions? They should have just let him be by her side as a human period. Any way the story was good, music was very good and the end very disappointing.