Suk Bin's mother wasn't punished enough for being less than a subhuman junky nor did Suk Bin himself. Both the female lead and her mother were absolute doormat characters, letting everyone have their way with them and completely surrender passively without even attempting to bite back. Completely infuriating to watch this behavior for 50 episodes. Even at the moment of the reveals if it weren't for the other characters acting on their behalf nothing would have been accomplished. Many characters were introduced but were never done anything with or even appear more than few times like Suk Bin's sister. The leads relationship had a decent attention and screen time in the first half but they were completely neglected in the second half. The drama also needed more characters and stories. The only independent side story was the FL's uncle which sucked anyway. It's safe to assume that the writing was very problematic when it comes to its characters.

It seems to be the writer completely forgot about the pink notebook.