Disagree, he was in an abusive relationship. He was someone who did not have any friends and to maintain the one friend he did have, he was forced to have sex. Then after he completely gave himself to someone who never cared about him but made him feel disgusting, he was completely traumatized. This is not because he was dumped. I've fantasized of doing this to my abuser too, it is just that fantasy come to life and honestly, I can't blame him. The fact that he is still holding onto that trauma, shows how much it affected him and his rapist doesn't even remember what he did to him. How can you ruin someone and then completely forget about it?
Sungho is really scary. He kidnapped someone because he was traumatized from the past is something really disturbing. This story can really be happening in the reality. the characters portrays very important role which it mirrors the reality from how simple "sex-mate" turns into obsessed person just because he was dump. This is nothing to be laugh of. This story is really good to such extent that people should be aware of things that they are doing. Because it will turn back to you. Sungho's character is somewhat you can see in people nowadays, they are the kind of people who are in the news that caused crimes. I encountered situations like Sungho and how awful they deal with it. hopes this will be a lecture/warning to all