I should clarify this a bit. In the very beginning I was planning to do a couple of bonus "routes" for each girl exploring different sides of their characters and their kinks. Those plans did not last long, but the word stuck.
In the current version of the game each girl has one "main" route titled "<Girl>'s Story", and one "alt route" for some kinky fun. The idea is, you can clear the girl's story without interacting with content folks might find objectionable. Femdom for Naomi, maledom for Lyri etc.
There is a chance more routes will be added later, but it's very unlikely.
The upcoming streamlined quest log should make it all less confusing.
Well, as in Naomi's Captain Misstres route, I was able to avoid all the sex scenes (refuse to do them), is what I did. In hers main story I only did the scenes that didn't have femdom.
I have yet to see what Lyriel's maledom looks like, but possibly also pass the scenes of her route (or even the route entirely if I don't like it too much).
Yona isn't a character that I like too much. I have started her main story, but I don't think I will start her route.
I think I'm just fully (or almost fully) seeing the main stories and routes of Cait and Rae.
There will be more scenes with Rae and Lady Sirenia.
I haven't seen the scene. But, unless the MC participated in it, I'm not interested either (and I'm not going to repeat the game to see it if that's the case)