There is no "True ending" where everything works out hunkie-doorie, the point of the game is that the path to building a harem realistically turns into a nightmare scenario. Story Anon made this game as a kind of critique of the way harem AVN's are usually written to destroy the agency of the women involved in the harem, and yet treat it as some kind of wholesome love story despite how sociopathic it really is when you stop and think about it (recall reading this on the Discord Server, don't remember if it was him saying it or someone relaying it on his behalf, or if it was someone speculating). The "true ending", as in the one where nothing bad happens, is probably the one where you just don't romance anyone you don't have to at all and go with whatever results. The real True Ending, which best fits the game thematically, is probably the one where you go all in on knocking up and lying to everyone, which produces the most awful result possible. If you want a "harem" story where things ultimately go in a positive direction despite much trouble, then go read Out of Touch.

Hope this helps clear up some things for you!