This is not a romance. There is no compasion, they are not in love, this is a story about torture. Don't romanticize it.
That being said: it's really good! It's actually got me scared for the main character and I really wonder where the story will go. Sangwoo is absolutly terrifying and his posessive nature is twisted, but he's really good at manipulating Yoon. There's no telling what will happen next but I'm hoping for some justice.
The story does a good job of not a romanticizing the kidnapping. There's the typical things that captors do to create a sense of dependancy in their victims, but it's clear he's psychotic. Both main characters are really well explored, I think. And the suspence is really well done as well. There is some R rated stuff sexually and gore wise, but definately worth the read if you can handle that.