There are 46 reviews so I'm going to just hammer one point: Hentai games have something that I'll call the "text to tits" ratio. This being, if you're going to info dump the player you need to compensate them with adequate amount of porn. Think of it like setup and payoff. This game does not have an appropriate text to tits ratio. The pre-hentai section of the game takes, at minimum, over an hour to get through if you read really quickly. An entire hour of lore and backstory before any porn. There is slowburn, and then there is this game.
That's the text, now for the tits. There are 55 scenes in total (including the 4 endings), however, when broken down it is far less. The game has only 19 unique CGs. When broken into unlockables per theme, the game has: 2 masturbation CG (12 scenes), 1 kissing CG (5 scenes), 2 outdoor CGs (2 scenes), 4 post-sex CGs (4 scenes with very slight lingerie variations within these scenes - variations being parts of clothing removed), and finally 10 indoor CGs (28 scenes). You will grind for hours simply to get the same CG over and over again with slightly different and more mentally corrupted text.
Pacing is important, and this game misses that mark. It is too slow in the beginning, though it gets a little better once she starts getting railed. They could have condensed the beginning down to 15 minutes and nothing would have changed. Is the story good? For an NTR game its incredibly good except for "ending A." Regardless, the issue isn't the story itself but the text dump. It is just too damn wordy. While it picks up after she starts down the NTR route the game is still incredibly wordy. Too much text, not enough tits.
Short points: The art is beautiful, gameplay is dull and repetitive with no real mechanics, there is no pure route (with how this game plays, this would've been a great addition as a "challenge" mode. Pure routes in NTR games are always fun additions), ending A is supposed to be the closest to a pure route but is by far the most fucked up, way too much grind, and a fantastic status menu (honestly the best part of the game outside of the art).
Play it, but only if you have half a day available and are more interested in the story behind the NTR instead of the physical NTR... but at that point maybe just read erotica.