NO NTR
This was what i was mainly concerned about if i'm being honest. As long as there's no cuck stuff i'm mostly fine with anything.
About kinks, besides harem (which i think this is?) i'd like some impregnation/pregnancy (NOT already pregnant from some1 else chick) if there's a place for it in the game.
Some virgin girls would also be nice even if there's no blood.
Also, if you plan on doing lesbian content consider to make it avoidable.
And one more thing, which i think a lot of developers don't understeand is for a harem game having a likeable protagonist (such as not being a wimp/simp/idiot/too pervy who gets boner from seeing a naked ankle etc) is one of the biggest factors for me personally.
Wish you luck, i'll check back after game gets couple more updates.