I'd like to start out saying "YES, THIS IS A HAREM MANGA." That being said, the harem motif isn' t really the defining factor of this story, but more like an instigator for action (without it, I'd see no reason for all these monster girls to conglomerate together)

However, not everyone in the harem is in love with main guy. Some have a mutual respect, others feelings more akin to sibling-hood. So, it doesn't always become a love brawl (even though there is always a match-up every chapter)

The premise of the story is a bit farfetched, but the execution isn't done half bad. The way in which the author introduces each character almost makes you believe they are all "REAL" species in the amount of attention to finer details to the real life counterpart each species is based off.

But, the downside to having so many characters is that very FEW of them are multifaceted, Most of the characters hold singular personally roles (in spades) and hardly deviate from character. But, being able to see so many of my favorite monster girls as characters makes me realize there has to be shortcomings somewhere.

To me, the manga is HEAVY on teaching a moral lesson (yes, there IS a lesson in this harem madness) in that we should all accept our fellow man ("interspecies"). Because of the preachy nature of said moral, the main guy character can come out a bit one-dimensional in that he accepts ANYTHING to a fault.

I wish that sometimes he would deviate from his "goody-too-shoes" nature and have a darker side that comes to light (but that is probably just me looking for an anti-hero main guy).

Still, the overall tone of the manga never stays in one place for too long, just the right amount of balance between harems, comedy, and moral ethics thrown in to make a ever interesting manga to read. (ALSO SO MUCH FANSERVICE FOR A MONSTER GIRL FANATIC LIKE ME!!!!)