Long story short - you should play this game. It's really one of the best 3D porn games you can find in internet. The rest of a review will be mostly about my thoughts on how it could be even better (in theory), but you still must understand that this game is really, really close to be considered as masterpiece.
Also, this game is highly recommended for those who just started to get interested by porn games and want to have some fun. Quality H-scenes and lenient gameplay will leave player in satisfaction in 95% cases. But let's get back to the reviewing.
So let's talk about "problems" of this game. It's mostly nitpicking because any other porn game would suffer from many lot worse flaws, but I still think that there's no limit to perfection. And my first nitpick will be about gameplay process.
1. The whole relationship system is redundant. Points doesn't affect gameplay anyhow, as long as you're on the right path. Their only purpose - show which of your choices they liked or not, which is just a lame way to imitate progression, meanwhile the actual progression with girls is clearly visible in the game.
2. Path system is sometimes non-intuitive. You easily can lose a path with a heroine you like and you wouldn't even notice this, unless you will constantly check the "Paths" tab in the menu. It is also weird that you can lose a whole progression with a heroine only because you've said something that you shouldn't had (but it'd be hella hard to implement this into the game: it is already very big, and the only way to solve this is to make it even bigger)
Plot-related issues:
1. Am I the only one which don't understand the connection between the game's title and the game itself?
2. And, which comes from the 1st paragraph, the beginning of the game doesn't really connects to the rest of the game. The first impression you get when you start the game - this is a game about fixing your school marks and relationship with the girls as well (which is ~70% porn games are about, boredom, so I probably should be thankful that the game isn't like that). My guess is that author had 1 idea in their mind but, during production, changed it to another and tried to re-make the story. In my opinion - not really good. But you can't drop your ongoing project to start another one, right? Also it'd believe more into MC luring heroines with demon nature and big cock than with fixing his school marks.
3. The game's main plot theme is about cultists - and that's the weakest part of this game. The only vibe they give to me is the vibe of 4chan massons memes about hidden governments with Jews in charge. Thankfully, the game doesn't really getting too focused on that and focuses on the progression between MC and heroines instead. But what if the cultists actually were a threat? Or, which probably would've suited the game better, they were caricatures on society's problems? The game's lore is really weak and if the game was only about it then nobody would've played it. But, again, this is only ~5-10% of the game so it's not critical at all. Also it doesn't tries to be somewhat significant and serves only as a background for a real show.
This sums it. Literally nitpicking, I feel so filthy. But the game is massive and it inevitably would have flaws, which I've listed in here. Nobody asked for it, but it's my pleasure. Again, in my very humble opinion, this is the best 3D porn game you can find and play. Porn scenes, characters progression and intercourses, gags (yeah, this game is pretty funny I must notice,) and a lot more are really magnificent. A few flaws can't ruin it anyhow.
5/5 - Peace