To help with that, I'll probably add a gallery mode where you can see everything there is to unlock (later).
That said, some choices do follow specific routes.
Each choice leads you down a path, because otherwise the story loses its narrative coherence.
If you're looking for a game where you can get everything with no real consequences, this might not fully be that kind of experience.
There will definitely be a route with Harem. Everything depends on the choices you make.
When you play through the game, you should normally get a sense of where things are heading, at least on the big picture. If not, a bit of surprise is also part of the story. Some choices will block certain routes, and that's intentional.It keeps the narrative coherent.
(All devlogs will clearly explain all the added content btw)