I really loved this VN! I actually clicked on it because it had a black lady on the display image (I'm black myself). I love the text and descriptions, the emotions and the kink--it was all very good!
And, since you asked for constructive criticism: I got a little confused by the narration perspective at the beginning. It might be helpful to have the girls use each other's names a little bit more in the beginning, to more firmly cement the narrative perspective, so I know who's holding whom and who's tightening their grip on whom.
Also, I REALLY liked that I could play it in-browser, without having to download it!