To answer content questions, it's only narrative, the dirtiest stuff is a bra and panty dressing scene, and a over-the-clothes masturbating scene that ends before climax. Nothing wrong with that, it you don't mind a slow pace. The art assets are solid, no complaints. Ideally, I prefer a save at any point system, over save points at the end of day cycles, but that's not essential. Pacing could stand to go quicker, but it's hard to judge at this stage.
As for the serving minigame... You'd want a tutorial screen if you're going to keep it, and maybe create a visibly distinct button for the areas you can click rather than mousing over them? On the other hand, you might want to just cut it, all things considered. The player isn't on Noemi's side, we want to see her corrupted and cheating on her husband. At least as the narrative currently stands, there's no reason for the player to try. I can't help but wonder if you couldn't do more narrative content with the time it takes to tweak the money earning mini game? I'm not a fan of Diner Dash and similar games, so I would just skip it anyways. If the majority of players skip it, then you may as well cut it. Now if earning money does more than pay off your debt, I'm all for it, though you might get the same earning mechanic down by a memory game that involves still shots instead of the animated interface. Just a thought, the further you get in development, the harder it is to change something like this. I think players enjoy making choices, even if the only difference is a bit of dialogue, a different outfit, or choosing between a facial and a creampie. More opportunities to make Noemi or the others choose an immoral choice. Now if you wanna make a pervy NTR Diner Dash VN, don't let me stop you. Just didn't look like that from the way you've done your other titles. That's my critique. Thanks for the hard work.