Dear Setib,
Since the game has been out for over a bit than a month there will be loads of more choices/content coming up in the future.
I'm not going to say anything yet about the characters and their progress but it will be more clear within a few months or so.
The prologue has no meaningful choices. It's just there to add a bit more to the story.
The mild/wild choices is a difference between vanilla naughty scenes and more hardcore stuff.