I'm pretty okay with the premise, but one thing he did down the line really bugged me and I hope it doesn't happen in the manga.
He has a girl that wronged him gangraped while being cannibalized (or was it one after the other?), which seems pointless after how he deals with the first girl.
This feels absolutely disgusting, and I feel anger trowards both characters, but I want to see the character development, I think I'm a sucker for stories from people recovering from their suffering.