You will be able to get together with all girls at the ending. But not in a group orgy or something, that's why I think the name Harem is a bit confusing. You can also choose not to pursue some girls.
I never said anything about an orgy, personally I'm not a fan (except in the case where the girls line up and wait for the MC, which almost never happens, because an orgy is practically everyone against everyone and I don't like that) I just hope that in the end the MC is surrounded by all his girls saying how much they love him and the MC reciprocates and if he has his spicy moment one by one, I'm well served, without further ado, greetings DEV