Calling him a psycho may be a little too harsh tho.
I think it's a bit more complicated than that (￣▽￣)
But he kinda behaved like a fucking psycho :S he exhibited violent outbursts. You'll see what I mean...
I understand that there's complexity to his mental issues, but he beheaded a stuffed animal. Imagine if they had a real animal. Also smashed his colleague and said it was a game. That's pretty much enough evidence to call him that.
You've read ahead? That kind of makes me nervous for the upcoming chapters. (⊙…⊙ )
Well f*ck... he's a psycho who received no treatment because of the parents' fear of having a child that is different from the norm. Somehow this rings a bell when it comes to korean content (parents trying to hard to fit their defective or creative kid into the "normal" mold), smh.