I mean I know there won't be a harem ending and I never pretended there will be it just is the most fun way to play untill there are consequences.Go for it. Absolutely nothing will go wrong.
Ignore the devs saying there is no harem, it's been a bit hot, they had heatstroke.
Kist play on one save and go for that harem, you can do it, I have faith.
Not sure if the consequences will be as dire as you make it sound though.
I play this game from the beginning 2 or 3 at every update so the only thing that will change will be that I explore each route separately as they come along but in the meantime I play it like a game with a harem ending and it's loads of fun.