Its not that wild of a take. But I think that dad was maybe in love with Ts mom and she died during child birth. But he was already married. She left and lived in poverty with our baby until she died or was murdered. Daddy T does not care as much since she left him but favors him since its her kid and is smort. Meanwhile stepmother for obvious reasons hates him and so does his half bro.

What if he is not the illegimate one but his brother? The ceo's wife cheated with his bro who is in a coma and he ended up in that state because he found out their affair and thats why he protected his real kid by ignoring him to avoid the wife's vengeance (probably she was the one who killed tae ha's mum)