Yeah, about that "harem" thing: the dev has said the game is not harem and was never intended to offer harem, most clearly and explicitly about a month ago.
They really need to update the tags here or add some kind of note to the OP that you can be promiscuous, but will apparently eventually need to choose. The dev also said they have tried several times to get the tag removed here, but have been denied each time.
Edit: Also, I wouldn't count on any throuples either, though I'd welcome a surprise.
The dev has some deep biases against anything except monogamy.