Far too flawed.
The prolog had a lot in it I didn't like.... but I played through it anyhow, because I understood it was there to set the stage for the story. That choices and direction would be yours once things were established.
So, despite many issues with it, I understood it for what and why it was. My rating is not because of anything in the prolog, and if you played and didn't like the prolog, my first piece of advice is to go back to the game, finish the prolog, and then get into the game proper, to see if it is more worth your time.
So, that said, why only 2 stars?
Well, the renders are great, and the story has room to be very interesting. The MC has some depth, and some characters are great.
Those are the pros, and they should be good enough for a higher rating, right?
Well, here are the cons:
1) disabled scroll back. believe it or not, all this does is piss off players and waste their time. They'll just save before choices or events, and reload. Or rely on autosaves. It doesn't encourage us to play any differently.
2) lack of choices. So, here's a scenario that may be very uncommon, but not unheard of. The player decides they are not interested in romancing the aunt. The player decides they do not like the cousin. The player gives his aunt the information he got from his cousin's phone. Aunt now has the chance to fix things. Cousin pays for being a cruel bitch. Both paths are closed (though may effect the story).
Some people would bitch this is NTR. Well, it isn't. You'd literally be turning them away as LIs, and thus they can't cuck you. Aunt would only go back if given the info, and if not, wouldn't, so any path with her wouldn't have NTR.
See, a choice like that allows the player to decide who he is interested in, and what to do with info he has been given in game. Instead, we get this info, we never use it, and we talk to the aunt about what a shitty guy her ex was.
That's a lack of meaningful choices, in my book.
But the bigger issue with choices is... they don't carry over chapter to chapter. I ended chapter one with just a massage. Chapter two is very clear that, canonically, more happened.
In chapter one, I did not talk to the guy playing guitar in school. In chapter two, he comes to talk to me right away about the conversation we... actually never had.
That is a disaster in games like this. Either follow our choices, or don't bother giving us choices.
Those two issues could be the only cons I see, and still effect the game so much, in both technical and story telling ways, that I feel warranted in giving it a low rating.
Add to that some very bizarre dialog choices that read like 90% native english speaker and 10% google translate, and a lot of story inconsistencies, and you have a game I got no enjoyment out of playing.
Which is a shame. If the aunt hadn't been manipulated out of her relationship by her bitch daughter and instead was just single, I would have been into her. The chemistry behind you and your mother (and the quelling of a concern about her behavior in the prolog), I would have been into her. I genuinely like Iris as a character, and would have loved to love this game, just for her.
But I ultimately think this game is a highly-polished looking.... but awkward and mediocre, game... that seems to utterly forget that you are making choices towards your own end, and railroads you into the scenarios it wanted you to play.