I just finished reading and already decided to make this review. I loved the history of this webtoon, I liked it so much that I read it at once.
About the story: It's a rather dark story so I recommend it only to those who have no problem with that. It's extremely engaging and you can get involved in a way that you don't want to stop reading until you know how to end it.
About the characters: Awesome, this webtoon proves that you don't have to have a long plot to develop your characters well, but a good script. The webtoon is so good that you can identify with Jin even though he is the accomplice of a serial killer and has done various atrocities, and still hopes that in the end he will be happy and live happily with the girl.
About the art: Beautiful, nothing to complain about.
I recommend this webtoon to those who enjoy a darker-footprint story with a lot of drama and romance involved.