If that's the case, the harem tag should be removed because it's misleading.
Meh. A harem means that you have a couple of women who you regularly and openly have sex with and who "belong" to you.
It does not mean that you have to have sex with every woman out there.
As per the dev, if you limit yourself to only one woman in this game, you are making it difficult for yourself (low energy, low prowess). So you likely end up fucking any number of women, regardless of which "path" you are on. Sounds like harem to me...
The problem for me with the multiple paths, especially in this game is that you have to make a choice to open a path very quickly, in like the first day of the game play. But that stage I barely know the character names, never mind which one I want to pursue.
Yes, in that case you may want to go back to the beginning.
But what I like about this game is that the paths are not very limited. If you are on the so-called Mom path, you can still have sex with Nat and/or Jo.
But yeah, if you make certain choices, you'll not see certain scenes.
If that's a dealbreaker for you, you can always use unren to extract the images...