I enjoyed this drama. I enjoyed all of the 4 main characters. I liked the story, the pain, the trauma they all felt. Lee An's interesting power and Seong Mo's story and character did it for me. I didn't feel like I needed a lot of romance and sweet moments, because the best part was how it all got twisted in the end.
As soon as I got the feeling something was off with Seong Mo, I actually hoped they would go that way. It made the ending way more memorable. Sad and dark stuff stays in your heart. Luckily, it's just fiction.