There are enough gushing reviews so I'll limit mine to a brief summary what I think works and doesn't.
H-scenes - cg porn can be palpably weird, kinky, outré etc. in a way that cannot be replicated in (legal) real porn because the latter involves real people. It's the former's one true advantage over the latter and the game exploits it about as fully as one can expect.
Graphics - look great. Lighting and environments are pitch-perfect with very few exceptions. Despite being weird HS models, the girls manage to look the part (especially the trophy blonde and the sultry sadistic brothelkeeper).
Characters - the writer/s can write. While I wouldn't say the npcs have actual personalities, they certainly have personality types that play out consistently over the course of the story and bring some drama and flavour to the h-scenes. A pleasant surprise on a website full of westernised shota fantasies and crass ripoffs of Adam Sandler frat movies.
Story, setting, 'paths' - when it comes to porn/erotic fiction in general, noir works every time, especially if the centrepiece is a brothel/sex club for the beau monde. That's definitely a plus. However, an abundance of branching paths leads to character inconsistencies, eg the PC's inner monologue being compassionate towards women he gleefully subjects to scummy sex stuff earlier in the story. It's over-ambitious (ie bloated) game design, which the devs should try to slenderise in future updates.
Its few but significant shortcomings did not ruin my fun, so 5/5.