Well, after finishing chapter 1, I decided to leave a review. (per request)
The first thing I want to say is I am excited to see how this game turns out. I have played quite a few vn(s) in the last year--of all levels of quality--and this one is easily going to be top tier if everything continues along the trajectory I have seen.
So, to the nitty gritty:
Visually, the game is stunning, and the level of detail is well done, top marks.
Gameplay has a few small hiccups, but nothing too bad. Most involve a lack of agency in my own perception. You're either interested in a particular girl or your not, so far that I've seen, no choices that make you feel like you "earned" someone's affection, but it is extremely early in development, so I'll reserve stating this as a good or a bad thing. (and to be fair, this is only going off the one girl you actually sleep with outside of fantasies)
Story seems to have some of the 'classic' tropes to the genre of the game, but don't seem too cliché, so lets hope it stays that way.
Also, the soundtrack kicks ass, thanks for that.
Overall, a great game (if a bit too wordy on my part). The few requests/comments I have (if I can ask so much) are:
1. For there to be a bit more nuance to the choices you make, to make it feel like short of expressing a lack of interest, there is still several chances to "lose" the girls in the story by just not vibing with what attracts them to the MC.
2. Animations :3
3. And perhaps a tracker for bios etc. I don't mean a point-system map (its your game, do what makes sense for you), but perhaps a way to read up on each character in game instead of at the end of chapters (if I come back 4 months from now, I would love a quick reference to familiarize myself with the characters again).
Sorry for the long review, but the game is really looking to be top-notch. Good on the folks at Oppaiman; I'm excited to see what they put forth!