Here is the full list of all 8 Fap Queen achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
You ended the game with the Succubus.
You ended the game with the Queen, aka. best ending.
That is what you wanted, right? Right?
...really?
We all know why you got this.
That is nice.
Afraid of the Succubus, are we?
That is some serious willpower.