I have to say I'm rather disappointed by the "illusion of choice" in this. I had no interest whatsoever in Catherine, but no matter what I say or how much of an asshole I am to her it's impossible to not end up fucking her unless you just completely refuse to interact with her. Why even have branching dialogue paths if there isn't going to be any actual decision making involved?
Choices have huge implications either by unlocking specific scenes, +/- karma, +/- depravity or +/- affection/submission. All of which have consequences in the routes of the game. There simply isn't enough content atm to see your consequences yet but even now, there are already several different paths and scenes you can experience ie. various scenes with Sage.
In terms of avoiding content with certain girls:
1. Catherine is an important figure. I can't just provide option to lock her routes out for players. It is crucial to continue her sotryline. I don't want to make a simple game where you can just lock out individual girls. Every character has a crucial part to play in the bigger picture with an interwoven story web that will be clear later on.
2. This is a harem game. Although there are love endings planned, you're gonna drown in pussy. That means sexual interactions with almost all women you meet. If you want to avoid drowning in pussy, then I guess this isn't the game for ya.
3. Lastly, this is a heavily choice driven game which will have major consequences in how you experience the story.