I'm not really sure about this one.
For starters mc (i'm not even sure, if you can call him that - it's mostly girls pov) is your typical shota with no character, the pacing of the story is way off and as for adventures - it's mediocre at best. Also i really do not appreciate ntr/ntr-baits, that seems to be a part of each volume (yeah, those are for the "greater good" and probably justified but i feel like it's just for the sake of half-baked sex scenes with ugly bastards). Also girls spends a lof of time in full-human forms, so take it as you will.
Now the good parts - the art is really nice, fanservice/ecchi is quite allright (lot of good looking, big tits), monster girls have proper designs(maybe aside from succubi girl, wich is bland-looking loli - but then again, is she even monster-girl and not just a deamon? she's drawn properly tho) and panels with fights are engaging enough.
For the monster-girls-fetish it's just "ok" (at least from my point of view), but as for "keeping the truth from the hero" trope there's waaaaay better titles out there.