Wait, didn't they kill him in the cave before he went back? What the hell is going on? It was good in the beginning and now it's a confusing pile of crap. I'll still read tho ¯\_༼ ಥ ‿ ಥ ༽_/¯
We never needed to see this flashback, or at least not in this long a form. A few panels to reveal the reason for the princess's disgust towards him would have been enough.
Up until Chapter 10 I was still a bit conflicted about the evil, but now I get it. He's nearly totally snapped and is repeating the cycles of violence perpetuated upon him. The Princess & her family willingly slaughter innocence to an unprecedented degree, and the "villains" are not actually so.
Hmm… reminds me of another series I've read. Not quite as bloody, but it has its moments. Heh.