Hello,
1- I want to develop the characters' stories to certain points first, so it wouldn’t be right to confirm anything about the harem content or the ending just yet.
2- If we're talking about a group with sisters or something like that, that might happen.
3- I'm considering making some content optional, but I can't confirm which content that would be at this moment.
4- Yes, there will be animated NSFW scenes. Also, there is already an animation in the game, with Lila's first scene serving as a small example of this.