I reread chapter 4, 12 and 17. Both MC & ML was adopted into the company. I think the father raped ML and why he's still so traumatised and self harm with s**. That's probably why the ML thought MC was also adopted to sleep with the dad/"chairman" in ch 4. The light-haired brother probably found out and they made a plan for ML "to kill him" so he was sent into exile abroad, clues in ch 12. The dark haired brother probably doesn't know anything so that's why he hates ML while the other one says "they're all brothers" and defends ML in ch 17.
Punch drunk love, Semantic error & Wet sand
