Being brief, it is a gorgeous short AVN. The choices you're offered could be implemented better, but it certainly works and is worth checking out.
And now for some ramblings.
All the stories use formulas. The stories I've encountered in AVNs usually come straight from porn, gaming, TV shows, or from gooning minds beyond redemption. What I mean is that when you play something like "Being a Dik," you basically partake in a good melodramatic TV show or an eighties teenage flick, but with porn. Something like "Hail Dicktator" is a pure Penthouse fuckfest that doesn't take itself too seriously because it would be insane to do so. Surely, you can continue the list.
Formulas tend to converge and intertwine. They usually come in tight little boxes: "You're an orphan living with your aunt in a small town, you have two not-sisters, and also you were a total incel before the game starts, so there's some personality split about how your actions will be described."
"One Night Stand" seems to be a game that stands upon online erotic fiction. You probably know the kind I'm talking about. It is usually female-friendly, has a prominent build-up, and treats sex as something private, liberating, and vaguely serious. It is also psychologically "deep," meant to provide an opportunity for sane, non-gooning people to indulge in their fantasies in a comfortable environment. The characters will have stories that function as groundwork for how they fuck (or don't). In many aspects, such stories are similar to printed erotic fiction, except that the ones you can find online tend not to drag as much, are more creative, and spend time only on what can actually be original.
So we have "One Night Stand." It is short. It is erotic. There is build-up to sex. It is a proper story. It is psychologically infused. And it is very nice, even if it's not my cup of tea.
The only caveat I can think of is the choices. Basically, you have three of them. The most important one is at the beginning and seems very innocent in nature, but it completely changes everything. I think its importance could be communicated more clearly. Maybe I'm dull, but I don't think there were enough hints at the beginning to indicate that the choice would lead you down a "corrupt" path with no chance of backing up.
Other than that, excellent. I'll be sure to follow the developers.