My usual disclaimers when writing reviews on here are that A. I am here for the "plot" not the plot and B. I generally dislike visual novels. So take both of those into consideration for my review when thinking about this game.
So, first off, anyone on here saying the writing and models are amazing are just wrong. The models and animation are all fairly mediocre. Don't get me wrong, there's nothing bad here, it's just nothing to write home about. The writing is generally okay as well, but it's a porn game so some suspension of disbelief is required and it's not like there's really incredible depth of character on display. It's enough to keep you invested though (I do wish the creator would have made a bigger deal of the supernatural elements earlier though so they don't come as such a surprise by 3/4 of the way through the current version). There are, however, a few sections where there is a bit more of a focus on "character development" and honestly those sections were just more boring and really dragged on.
The real draw of this game is that there are a lot of sex scenes. They are extremely regular and with a lot of different girls. It's a proper harem game where instead of just one sex scene with different girls (who are then ostensibly in your harem) you will repeatedly come back to them as time goes on. Also, this is why the lacklustre model/animation quality isn't really an issue because it's a case of quantity over quality and I'd argue that in this case it actually works out. Plus, while they're not SUPER amazing, the models for the girls are all hot, so that's also a positive.
A final positive is that the kinks worked into the game are all things I specifically enjoy. There's force/rape, impregnation, master/slave elements which are all excellent (although actually a lot of people in the reviews seem to say it's "too rapey" but I actually would have preferred it if there were more instances of genuine forceful stuff). So for fap material, which again is why I'm here, this was pretty great.
Now, downsides: there are four really big problems that I take issue with. As I said, I dislike visual novels in general, so I automatically remove a star for that anyway. And unfortunately I think this game rather demonstrates the worst aspects of visual novels in that currently there is basically only ONE route through the story. The interaction is few and far between, and when you are ostensibly given branching choices for the most part (aside from one or two instances) they actually either lead to a game over or don't have any affect on the outcome. Essentially, there is very little interaction, which is a big downside for me.
Second is actually more technical. I really hope that when the game is finished that the creator goes through it a few times to clean it up and actually decide what sort of game he is trying to make. On more than one occasion it feels like he was originally planning a dating sim type game. For example you are told "X girl can now visit you every night" but there is never an option for that, so it was like he initially wanted to have time-slots and actions in those time-slots but completely forgot about it along the way... Except this happens on more than one occasion. I just want him to commit more to actually making a game that is a visual novel and not a dating sim. Similarly there are a lot of instances of changes in the UI and QOL issues which just need smoothing over and can be jarring to experience (for instance, why is there a shop that requires money for the first 5 hours and then the requirement of money vanishes, because you can't actually earn money in the game).
Third: there are a few instances of straight shota involved in the game. Not in very sexual scenes, but treading the line just enough to make me uncomfortable (for instance the "sexual education" scene was really awkward and I genuinely believe should be utterly cut from the game).
Lastly, and this for me is the really big issue that knocked it down from mediocre to poor. While the writing is mostly fine, the humour is absolutely gawdawful. The creator fills just about every second line with forced "punny" references to everything from Warhammer 40K and anime to memes and current events from the last few years. I have no issues with this happening occasionally, but good lord is it overdone here. Particularly when it's in the middle of sex scenes and the like as well, it just grated on my mind... He really, really, needs to tone that down and remove about 95% of them to allow the game to actually have a bit more flow and MAYBE it might actually get a laugh from me. He also has a really weird habit of occasionally trying to show off how intelligent the MC is (and presumably show off himself) by shoehorning really obscure art and science knowledge into dialogue which again was just massively jarring and out of place. I have seen one other review describe it as "self-aware" and I genuinely take issue with that. "Self-indulgent" is the better phrase.
Tl;dr the game is great for fapping because of how regular the sex is, which is the only reason I could get through it all because of just how absolutely dire the dialogue and internal monologue can be.