Idk, you guys. The pattern with this author is to have you start to hate the main seme and think he's bad, then introduce a character that seems good but turns out worse. Cain has some mega psychological issues starting with abandonment. Yahwi doesn't understand what love is, how to react to it, comprehend it, or accept it. Is that an excuse for rapiness? Nope. It does explain his actions, though. His household really fucked him up, and he's showing signs already that he's going to change. I have a feeling things are going to get far worse (probably on all sides) before they get better.

I think Cain is faking not being good at Korean. He's obsessive, so it would suit his needs to have learned the native language of the one he's obsessed with and then fake being bad at understanding it to garner sympathy and/or be able to more easily impose..... I'm totally watching you Cain. I don't believe the goody goody act for a minute, no matter how good looking you are! Ut, damn, I hope I'm wrong.