Monster girl harem this monster girl harem that, but they just look like humans in a cosplay. Wish there were more monster girls like Tsumugi from knights of Sidonia (though she doesn't really count now is it, since she became human in the end)
sooo, in hindsight that mangas used to teach a moral, i guess the moral of this story is: it's okay to drug females to get them into your bed....sight, where is this society going???
It's not that serious, MC is just looking for a way to survive. And those thick beastkin deserved it since they enslave human. So the moral of the story should be "Stop slavery even if it means drug and aphrodisiac"