(This review was made after volume 12, reading the fan TL. There may be spoilers for major events, but I do my best to avoid them.)

This show is a fairly generic harem romcom. It gets better over time; at around volume 5 I started to realize I was actually enjoying it.

The main character (Keiki Kiryuu) wants to find a normal, not perverted girlfriend, but all of the girls in the harem have some pervert element to them, so he tries to de-pervert them until he realizes that the pervert qualities are an intrinsic part of a person and so he shouldn't.

I really don't like the first arc, mostly because the end result is so obvious and yet too much time is spent on it. The reveal it ends with also didn't have anywhere near enough foreshadowing; I felt like it pulled on details that hadn't previously been mentioned anywhere. But it does establish the characters, at least. After that point, the story becomes actually pretty decent.

The members of the harem all have some sort of perverted quality to make them unpure, and so Keiki isn't interested. While this is the first time I've seen anybody that has an NTR fetish, it includes a lot of the standard stuff that comes from a having a masochist/sadist/fujoshi/exhibitionist/olfactophile character. I don't particularly care about the specifics of that that much though; it makes for good fluff, but I came for generic harem and so I care about the generic harem. (There's other characters too; a lolicon and loli pair who act as the main support, a yuri lover who's part of the harem, a crossdresser, etc.)

Keiki is a very normal harem protaganist, in that there are a lot of events in which he does something significant for one of the characters, and he is a wimp who gets tossed around by everyone (he gets loaned to the student council at a point). A lot of the harem events happen during the story, and they're generally the most enjoyable parts. The characters are all unique, and for some the extra element that their fetish adds is actually the fuel for the events.

As stated above, Keiki eventually changes. After he decides to actually go out with one of the characters, he gets the same kind of feeling as the people reading the story: that without the fetish, the character really isn't the same person. This is what I believe the central theme of the story is, and it not focusing on this until very late in is probably why I find the story doesn't really get good until so late in.

As of vol12, they actually had someone win, which indicates that the story will end soon. I think that this winning is predictable and expected, since there's a lot of signs of it; this is much better than the reveal about the Cinderella panties at the beginning. I think it's one of the clear pieces of evidence that shows that the writing improved at some point, but I also know I always dislike the start of a story.

The volumes are fairly short, and chapter breaks halfway through a volume are often better stopping spots than the end of a volume is. (It makes it feel slightly more episodic than it actually is.)
If you don't like harems, don't read this. If you do... well, maybe give it a shot, but I wouldn't consider this good by any means.