This is more of a full-price NTR game with a tiny bit of a harem. It would be most logical to completely remove the harem and continue exclusively with the NTR route.
for a successful game of the mixed genre harem-ntr the content of the harem part should be 100% a couple of examples "Love and Sex: Second Base" "The Power of Vacuum" otherwise there is no point in spending money on a game of the harem genre and getting not a whole game but a cut piece. Of course ntr should be completely avoidable