The start was very promising and each episode ended with a nice cliffhanger that encouraged me to watch the following episode. However the mystery was quickly revealed without much development and replaced with another mystery in every episode. I hoped it would all come together in the end but my expectations were met with disappointment. I detested Shin Se Kyoung's acting as it didn't bring out much of Yoon So Ah's supposed strong personality. She was supposed to be rational, strong and open-minded psychiatrist but turned out more like a whiny kindergartener. I understand her attitude to the kids her dad brought home when she was small, but she was very mean to her junior at work until the very end. I didn't like Yoon So Ah's character either. Ha Baek was much better in my opinion but still not all that likeable. I liked how in the end it turned out that So Ah's dad was the one who saved her. It was a huge surprise to me as I had crossed my fingers totally expecting So Ah to have been saved by Ha Baek in the typical k drama fashion of lovers meeting or saving each other in the past. Since I hate less than perfect endings, I was disappointed with Ha Baek staying with So ah only until her death. I felt that this is not all that better than Nak Bin. Ha Baek would watch So Ah grow old and die only to be devastated. I felt that since So Ah was able to make a wish, if she was smart, she could have said that she wanted to be with him forever and they would have had to go to the world of the Gods together and since they wished to be together, Ha Baek couldn't die even if he never went back. I hate it when there is a bittersweet ending when they could have clearly easily had a much better ending. This bittersweet ending was clearly not the only choice they had. I liked the OSTs and visuals of this k drama. i think some people who like sad, sentimental and emotional dramas will like this.