(Review is for v0.4 Remake)
So this game is very close to being a 5/5 for me, but there's just a few important points that hold it back ever so slightly that I will mention briefly below but go into more details for the purpose of constructive feedback in a thread post instead, so as to not clutter up this review.
First off, the (very) good stuff.
The models and graphics are actually genuinely amazing. Most other games with these kinds of models either fails to sticking to a unified style and so feel all kinds of weird, or they are of much lesser quality. I've played quite a few AVNs like this and I'm genuinely impressed.
The animations (when they run) are great for the most part, a select few have clipping issues but not many at all and not to any degrees that really detract from the game.
Unlike what a lot of players seem to be saying, I actually quite like the story in this. Sure, it's fast paced and admittedly a little too fast at times, but overall this is close to the pace the game absolutely needs to hold to not get completely stuck. If every girl would have hours and hours of teasing and nonsense before you even got to kissing, like some games do, this game would literally never get done in a million years. In fact I much prefer games like these that get to the point in a orderly fashion, but still manages to tell a story. Also, the story actually makes sense. Again, the story doesn't beat around the bush with an MC who refuses to get with the program and acts like an idiot over and over, everyone involved knows where the story is headed so the story respects everyone's time by skipping a lot of the unnecessary tropes of a completely bewildered MC and gets to the good stuff sooner, while still retaining all the necessary logical and narrative steps as to get there.
I'm thankful there is music, but it could maybe do with a little more variation. It's still vastly better than a AVN without music, so I'm not going to press this point very much at all.
As for the few negatives that is holding this game back from being a 5/5 IMO, they are, briefly:
Animations don't loop but instead end after just a few seconds. This gets very annoying when you just want to stop and admire a certain lewd scene, but should also be fairly simple to fix.
The constant mixing between mother and landlady is kind of jarring and does noticeably, if not hugely, impact the experience negatively. It's another fix that should be relatively simple, the game just needs to decide which one it wants to be and stick with it consistently.
A few spelling mistakes or cases of bad English here and there. Certainly not as bad as some games, but enough that it sticks out a little bit.
TL;DR: Great game in need of a few fixes to reach its fullest potential. I still fully recommend it as it is now.