This is my first time writing a review so forgive me if there are some flaws.
As many have said, this is the third game in a series that stars the same main character in all three. Setting, and time for each is different, but the premise and overall gameplay loop are the same. If you look through the comments of any of the three you are going to get effectively two groups of people.
Ones that say the game is overall quite good, bringing to the table a mix of ideas that are rather unique, though perhaps execution isn't necessarily perfect. I don't think anyone is going to complain that a free adult game isn't perfect, but the other side you frequently see is people saying how the game does have some rather fundamental flaws.
In all three soft locks are present where you accidentally do the events in an incorrect order, and thus skipped an event that you no longer can go back to. This results in you having to repeat the chapter again trying to make sure that you don't trigger the soft lock.
I will say that I personally do enjoy the flow of the game and seeing the characters change overtime, but it does become rather frustrating at times when you just cannot figure out how to trigger the next event. The common argument made is that this adds challenge to the game to keep it from being to easy, but in actuality, most tend to agree that is becomes rather tedious.
If you play the game for a few updates, you will come to recognize the general pattern pretty quickly, a girl comes in claiming to be shy, eventually gets convince to go topless, then naked, perform a BJ, then finally sex. After this the girl often gets thrown to the side for the next one to come up and repeat the cycle. I'm not saying that its terrible or anything, but revisiting old characters, adding a bit of personality to them, and small interactions with them would add a considerable amount to the game in my opinion.
This review is already quite long so I will summarize the rest, there are grammatical errors, for me this isn't a big issue, but be aware if that is something that bothers you. Performance is fine, as of now the game isn't that big, writing this as of update 4 it sits at around 600mb. Updates are typically monthly, and generally provide a decent amount of content.
Overall its an okay game, but you have to be very patient with it, understand the way it flows, and accept that you likely will encounter a soft lock. I frequently find myself looking for posted saves to help get past the soft locks. Writing this, the most frustrating thing is seeing potential in it, but watching as yet again that potential is barely tapped into.
Looking at other reviews, most ratings are lopsided at either a 1 or 5 star. I went with a three because, I think the game could easily become more, but as of now I cannot justify a higher rating even if I find many aspects unique or interesting.