Oh, this is a weird one (v1.19, May 2020).
Naturally I was intrigued by the glowing reviews and the version number. Both turned out to be a bit deceptive, although not quite in the same way. I am tempted to give it 5 stars on account how... thought-provoking the flaws of this game are. So strap yourselves in, lads, we're writing a Serious Sophisticated Review (naaah, just skip to the TLDR and ignore my ramblings)
The first thing one notices is the art style. It's good for what it's worth, although it suffers from the same face, body, and age syndrome. You think Aroma Sensei is bad? Wait until you try to tell headmistress and math teacher apart! There is one important note here, the art style clearly aims for realism. This will be relevant later. Next, paired with visuals there is a decent chunk of commissioned voice acting, again, very well done and realistic. Sex scenes, however few of those are, are voiced (with one exception). It certainly reinforces the immersion. The UI/UX is pretty standard RenPy fare, but nicely textured and gives a "serious" feel. BGM is pleasant and unobtrusive.
Okay, so by now you should take the hint, it's realism as real as it can be yadda yadda yadda. Do you even real bro? And here is where it all came crashing down for me in a way that I couldn't quite put my finger on for a few hours after I finished playing.
And then it hit me. While the audio-visuals just scream realism, the story fails to deliver. Fundamentally this is a silly incest fantasy plus school setting (ugh) plus an improbable noir story. I think either of these could work while maintaining suspension of disbelief, maybe even two, but never all three. It's just too much to take it seriously. (Alternatively, you could throw out the notion of realism entirely, and it would also work, in a way, AKA make a "parody" game)
But even if I grant you a technical possibility of combining incest, school, and noir, there's a price to that. Such task requires impeccable writing. And it is nowhere to be found. First of all, Milky Touch needs an editor. Badly. It's rife with very crude mistakes that are apparent even to someone who is not a native speaker. (That means yours truly. So when I say it's badly mangled, it has to mean something.)
And then the purple prose. Oh gods of rule 34, it is so purple. On a scale of 1 to 10 I give it eleven murexes and a magical pony princess' seal of approval. Simply put, it as purple as it can ever get and that's a bad thing unless your goal is self-parody. It really reads like a joke sometimes. And don't get me wrong, I would've enjoyed the absurd excessiveness if it was framed as a diegetic joke, but it's not. And so it clashes with realism once again.
So that's the biggest flaw, the game sets some expectations and then fails to deliver them, catastrophically so. The end result is a really weird dissonance. Everything else is quite minor compared to this.
Mechanically Milky Touch is almost a pure VN, and it would be fine, but nooooo, someone had a bright idea of spicing things up. You see, there's a lock-picking minigame slapped on top. And by slapped I mean it's devoid of any purpose to the point of being insulting. When the story dictates that the character can break a lock, you can not fail it. When the story decides that character skills are not sufficient, it says you failed even if you beat the minigame. Just... why? The whole point of trying to beat a (mini)game is to win against all odds (big surprise, huh). Railroading me to a loss is basically an insult. This is not how you spice things up, this is how you annoy people and waste your own resources.
In the end, the lesson of Milky Touch. If you strive for realism, you better put on your Big Writer Pants or go home and try something easier. Write a self-parody, r34 parody or whatever less serious genre you want. With that, I'm tentatively giving it 3 stars. It's maybe 4.5 out of 10 on account of very low amount of adult content. I suppose it could eke out a 6 in the future by adding more of the same and maybe even go beyond a six by expanding the list of fetishes (for example stealthvibes and/or orgasm denial would go nicely with this sort of VA).
TL;DR: Good for a one-time mindless fap. Above average CGs and solid VA. Unfortunately not a good game or a good story at the moment; also quite short (it's incomplete, after all). Right now, average at best. Be sure to check it out in a few years when it has a decent amount of scenes with actual sexual activities.