Just let it go. Why so overworked with that kiss scene? All the bad guys inside the jail, most of them have dysfunctional family. When you are raised like that, abused (SO has been abused by kang clan) and unloved, you will act like a psycho especially when someone that said he/she trust u suddenly talk the opposite for just a day. It's like u get backstabbed, if u are raised properly by good family, of course u will just accept it and let it go. But if u are full of anger, sadness, unhappiness, shame, etc, u guess what will u do? Of course it's a big no to do that kind of thing in our point of view. But that's the reason why SO did it, so that we know he is not properly taught since he was kid, he is not someone with a good manner since nobody cares about him let alone teach him about manners. He is just the person like that, just accept it. Someone who is so desperate for love and can kill for love. (Just like what he did, massacre the monks for his mother). Yes, he is not a saint, his character is supposed to be like that, ruthless, cold blooded king. Who knows why soo will like him eventually? I will just continue watching the drama, a lead character does not always have to be so perfect. I watched dream high before and hated hyemi character so much but she improves and learn about her wrong action eventually so i like it. So i think he will learn something later. Who knows? The show is not even finished yet.