At the moment, I have finished 4 of the 6 routes (7, if you count the vanilla route, that I don't know if it is really vanilla yet) plus the Saki scenes of
夏色のコワレモノ and I can easily say that it is one of the best ntr games released in a rpgmaker engine. The quality of life options, amount of detail, scenes, locations, number of character CGs variations, cellphone system, personality variety of the ntrguys, how you can play the game the way you want (oblivious, stalking, seeing everything or nothing, choosing the ntrguys, having just a good summer with her, etc), sprite animation, casual non-h scenes, school horror scene (lol), collectibles, amongst other content and details. Before analyzing you have to factor that it cost 1,496円 or, more or less, 14 dollars and that most rpgmaker games or visual novels at the same price don't have this much content.
One of the few things that bothered me is that I had one playthrough with 3 guys at max, but, after the ending, the recollection room just unlocked the scenes for the one you choose to end with. So, the game have a many guys at once option, but this encourages you to get only one guy per playtrough. Another thing is that I was expecting some interaction between the guys or a scene when you get many ntrguys at max at the same time, maybe it has one, but I did not get it yet.
I hope for more releases from this developer, I really respect when they go beyond what the rpgmaker and similar engines usually offers and start applying creative mechanics and innovations. For example, I had a similar sensation with
少女異聞録 (it is not ntr), I was amazed with the amount of content, options, mechanics, personalization, fun scenes, gameplay and parody (it does not look like it, but it is a persona parody in some aspects) it had.