I was never on the harem train, so I'm also eager to see the salt flow.
I don't frequent this thread as much as others, so if it has been confirmed by a dev that there will indeed be no harem or multi-partner ending of any kind, please let me know.
That being said, I would find it to be something of a mistake to seemingly include hints and possible setups to such a thing and not deliver on it. As with most things, it's not impossible to do it and make it work provided that it's written in the right way, and it does appear that there are ways to do this with the vast majority of the women in this game.
This game feels like it's more than capable of providing a
harem or multi-partner ending, so long as it doesn't rip our heart out like Acting Lessons. Not every game has to have
a harem, and some games make it very clear that this is not something that is going to happen because of how the character dynamics and relationships are set up, like Being A DIK, A Mother's Love, Fetish Locator, Big City's Pleasures, etc, but this game is very capable of having such an ending and provides, whether by accident or design, plenty of hints that the door can be opened and, in my opinion, it should be open for those who want to walk through it.