This game somehow completely flew under my radar but is one of the best games to ever grace the pornogame genre. A visual style that while under some slight anime influence is completely its own, gameplay that isn't overly grindy but still has some if you want it, a solid core cast and some very good scenes. It's also genuinely a game and not only a method of delivering pornography. The name Mist was also fitting considering how at times it gave me a little of that Myst vibe (though the horror in the woods also gave me Darkwood vibes which were thankfully dispelled extremely quickly)
You have nailed both a good character dynamic between everyone as well as a consistent tone many games struggle with. Scenes aren't constant but frequent enough. Your verisimilitude levels are off the charts. Having an actual story, that actually progresses as well as believable characters (the first twist alone with the MC utilizing empathy alone is extremely rare in these games) is also very refreshing.
I just went through the whole game in one go and it was a blast. You can tell how far you've come with the animations since you started in the anal scene when compared to the earlier ones and I really look forward to seeing where it goes. Not just on the animation level either but the technical too, where in the end you focus more on the girls and less on the MCs back. Tbh, at the start I was hoping it would all be POV but ehh, thems the breaks.
On a personal note I like how you hint at impreg content without going the whole hog, which is a happy medium between us men of class who love that and those who do not. I really hope that features in the game.