Pal, you got the fucking goat of h-games. As actual feedback i can say.
1 Grind: If the system continues like this, it's ok, but that's for History, because girl's perks are an actual hell, you can train her for hours and hours and continue in <50 points, even doing the training with 4love/4obedience.
2 History: It's perfect, I can only say something, would be better if you only can select one route, instead of 4/4 you can only go for 4/0 or 0/4, with something like "wife route" and "pet route", being the same shi since 3/0 or 0/3 but in the last instance, the history change drastically, like making the girl a cuck in the 4/0 route or a public pet in then 0/4, anyway, this is just a opinion, the system still the goat like this, just a little bit slow.
3 Mechanics: THE FUCKING GOAT. I'd never play no even a h-games, never a dating sim with this mechanics, the sanity isn't even out yet and you're already have the goat in mechanics. The only thing that I can say it's about caught mechanic, using points to upgrade you stealth it's literally useless, so you should make that also help you to be more stealth during public act.
4 Recommendations: Continue with the AI, rn isn't necessary handwork art, your mechanics are heavenly and you should continue adding and refining them. Also, about history, the most important thing it's making the grind a little least repetitive, because you have the length of games of a game with progress linked to a written history, with your game don't having a constant progress (your history progress it's reaching a new level of love/obedience while those games have history progress with each act).
Anyway, you have the goat pal, continue like this, fucking 9/10 game (doesn't reach the 10 because isn't complete yet)