I am giving this game 5 stars and not 4 because the engine is not renpy but still gorgeous. From the looks alone this game is a masterpiece, renders included.
Luckily I only started playing with the current version (.6) and from the patchnotes it looks like the framework was pretty crap before (heating graphics cards, no read-dialogue skip, no gallery mode, load times). I had no issues whatsoever playing it now. It also has a nice dialogue-log and the save function is really good and fast.
About the meat of the game:
It has some of the most impactful choices I have seen in visual novels of this type. While some key events happen in every playthrough, the player can actually influence what happens, with side events and variations happening depending on those choices. That said, the story is not much to write home about. It is basically a dating sim with two girls.
The main fetish, NTR, is sort of disappointing. One of the main girls is just a pathological slut and I cant get myself to see her as a love interest even when trying. I like her as a character, but when she fucks around it does nothing for me.
The other main girl is cute though, and being able to corrupt her is great. The secondary fetish, said corruption and domination, has a good start but then the game ends. I dont think there will be any satisfying developments in the next couple of updates. Her NTR route is just as bad as with the other girl, just because there isnt much happening. She chooses another guy, who I dont really dislike, and posts a few tame instagram pics.
There are also frequent English mistakes, but while noticeable I'd call them mild.
In conclusion I find the game kind of falling flat on the erotic side, especially disappointing because it looks and feels really high quality, plus has some really good sexual teasers that then arent explored enough. (Mild Spoiler: I mean the slut getting involved in corrupting the cutie, and the cutie being a natural submissive. Those things are established, but then nothing more comes of it in the current version).
Still five stars because of the potential, but it might take another year or two before the game has actually earned it.