Before Princess Twilight Sparkle can become the new Ruler of Equestria, she must join Celestia at the top of Mount Everhoof for a very unique test of her will. Despite how long the two had known each other, and how strong their bond may have been as mentor and student, Twilight has to prove that she can surpass Celestia in order to be her successor. With nopony else present to interfere, the younger Alicorn has to put her through an intense test of endurance; when Celestia can't take anymore, Twilight will have proven herself to take taken down a Demigoddess.

Of course, how she takes down said Demigoddess might turn a few heads. And probably make a few cheeks blush in jealousy~

Note: The story was the winner of October's Randomizer Poll on my Official Patreon Page; the winning entries were Princess Celestia as the main character, a cold winter's night as the setting, and Orgasm Torture as the main kink. Other kinks in this F/F clopfic include bondage, being blindfolded and gagged, toy-play, sensory deprivation, and lots of squirting. Reader Discretion is advised.