Visually the game is great, both the renders and UI design. There's even a music player, nice! What unfortunately kills it for me is the pacing; most dialogues are too long for my taste. I'm usually patient and don't play AVNs just for the porn but there's not enough (non-sexual) exciting stuff happening to keep me on board.
I do like that the dialogue has explanations for words that the reader might not know, saves me a Google search! I would suggest that instead of annotated metric conversions you just have a setting that naturally changes all dialogue to the reader's preferred measurement system. But maybe it doesn't happen often enough to really matter, idk.
An impressive first release indeed! Though the pacing is either bad or just not for me. Still, best of luck with your brand new project!