Um so you're saying you didn't actually read the story? Otherwise how could you have missed Bae reading the story of Sangjin's wedding to a woman, how he was endangering Sangjin's life by changing the direction of the story in the book, how he was constantly interrupted when he tried to confess to Sangjin, etc... because, if you HADN'T, you would know this points to Sangjin being in love with HYEWON not Sangjin. Oops?
Or are you just like Red (another commenter) who thinks that it's fine to expect victim's to do more emotional labor than their non victim (an actual abusive character in Red's case) counterparts then blame the victim for eavesdropping when their performance of emotional labor turns sour? Ew.
I'm gonna keep on reading this but I still hate stupid main characters because the story revolving around the guy never understanding people's intentions is lazy writing tbh