I never understood why the human girls had weapons at one point, defending the beastmen. Then the next page they're all slaves the beastmen are using as cattle. "Ok, you lot, we'll free you from your torture and rape for a few minutes. Here's machineguns and rifles. We'll take them all back after the battle is over so you can all be chopped up into hamburger."
Oh well, misogynist guro rape doujin is misogynist. Yawn.