I FOUND IT -

Honestly, I remembered this being rated A, for some reason. I think that's why I had so much trouble locating it. I'm glad it was as insightful as I remembered it being, maybe a bit more then it was when I first played it.

There's a lot of short VN that are good out there; this one is precisely the right length for what it does. If you somehow wander in here, do yourself a favour and play it. It was entirely worth the search.