Yes, the content is aimed at ending in a harem, but you have to make the right choices to stay on the path with everyone.
In the future, there might be a scene between the girls, but there definitely won’t be any NTR in the game. The scenes themselves aren’t skipped, what happens is that if you don’t like a particular character, you won’t get their scenes because you won’t have enough points with them. But if you do like the character, and in the future I add a scene that not everyone might enjoy, I might make it skippable.