
I wanna know what his childhood was like to make him that fucked up

Rather than saying it was his traumatic past. It's just he was raised that way. His mindset already been set up that way since his early age. Ofc it did not justified his actions which went too far. And jae han is not miserable if I suppose to say or admit. Haha... And jae han how do I say this. Idk man I just can't see jae han as someone who's in misery something like that. He's unlike other type of toxic character who'll fall deep into misery regretting something so deeply till they overthink at least in my opinion
From the raws it looks like the little sister isn't malicious or out to get the mc, she's just really dumb and really spoiles
I read the novel and I think the sister is wicked in a spoil self observe way
Will have to see if manga has her the same way
She might be dumb but not innocent. She's manipulative af.