The female lead started off as a shy, struggling but smart person. In the first episode she sees right through his nice guy façade. As the story progressed her character deteriorated. She is blinded and dumb when it comes to her boyfriend. Later they show she does know what he is like but overlooks his flaws which proves she is twisted in her own way. She learns to stand up for herself when it comes to others but with the male lead she is strangely submissive.
So there is a fine line between dark & mysterious and sociopath. The male lead is borderline sociopath. I believe a guy like him needed some serious psychological help which unfortunately he does not receive. They call him “strange” “weird” but no one pushes this guy to seek professional help. He has no redeeming qualities. Till the end he does not feel guilty for his actions against the second male lead or anyone else for that matter. There is no growth in his character he is completely unlikable
The main couple's relationship makes no sense. She is initially scared of him and very uncomfortable around him, suddenly out of nowhere she is falling for him. Women naturally look for safety. It becomes difficult to fall for a man who scares you makes you uneasy.
At one point I started skipping most scenes and would only watch the second lead. (scene stealer) the only person who shows immense development. He even apologizes to the male lead at the end even though he had been badly wronged. His relationship with the female lead was sweet and fun. He would bring out the best in her. The female lead cared so much about him at one point I was sure she has deeper feelings for him. #BaekInHoDeservedBetter
I like that they broke up at the end but hated the fact that she was still pining over him. She could have had great guy or moved on and stays single but instead she wants the unhealthy toxic relationship. Which was quite pathetic.