@KYL He's not a two year old but nor is he a 30 year old adult. Either way he's still young. The brain doesn't even fully mature until 21. Blame the ones CLEARLY at fault. The parents already set Hee-ryang aside because he's illegitimate. You're assuming a lot. Never did it show that he truly mean ill-will towards Hee-ryang, only that he felt less of himself and that he didn't fulfill his role as his fathers legitimate son