As of v0.4.5.
Honestly, I haven't played anything of this level of quality since MIST.
In summary, the characters do a good job at filling their roles while having that hidden side to each of their personalities, the artwork goes from middling to high level quality as the game progresses, and the game does a very good job at leaving you wanting more.
For a more in depth review.
Some people have an issue with the way the story was written and how the MC acts at the start, and while I was playing at the start I agree, but with the full context of the current update, it's a little clearer why it was structured that way. I'm not sure if it was intentional or not, or if the attempt was just not reached to that level and the writing only improved as the game kept getting made, but there is a reason for the writing decisions that were made, at least that's what I hope.
At first, I didn't like any of the characters as they were introduced, and I assumed there was always going to be one or two girls I actively avoid, but I found that to be not the case. I think this is what many people are referring to when they say the game is well written, because the characters are structured very well and have strong personalities, and that's what makes them compelling after you get to spend individual time with them, you get past what they present themselves as and see the "real personality." Even the MC gets the same sort of growth.
It's very apparent that the game using Koikatsu as a base for the artwork. But as the game goes on, the developer(s) have found really interesting ways to present it in a way where it doesn't feel like that's the case. I'm not sure if it's different shading or if the 3d models were used for reference then drawn over, or even a mix. But the artwork does a really good job of selling the characters, all of them are unique, the camera angles used are captivating and really solidify the illusion. There's also my undeniable bias for heart eyes, it simply has to be stated.
This game's world and story are nothing too brand new but the way it's structured and the world building is introduced makes me extremely compelled to find out more. You're given very small hints of things, and as the story goes on you're slowly given in knowledge to fill in the blanks yourself. The story simply has me invested, and has done what few other games are able to do, which being is to let me fantasize in full. I have a lot of theories and ideas on what the future of the story is, not just for the girls, but for the MC and the world itself, I am that invested in it.
This game was clearly made with passion and love, and the attentive detail that any creator should pour into their projects. I can't wait for more. For where it takes me.