Shirley Mill is the beloved youngest daughter of the Sword-Wielding Grand Duke of the Holy Rhine Empire... and his rechargeable battery.
Every day, she's either charging her master's batteries (providing magical energy) or on her way to charge her master's batteries (provide magical energy). She likes the girls who tease her in embarrassing ways, but they always leave her flustered. She likes it a little, and finds it a little annoying.
But then one day...
"O maiden, draw the sword in your heart." In a sea of flowers, a white-haired young man wore a wicked smile.
And so, under the command of an inescapable destiny, she set out on the path to becoming the King of Knights. The end of that road was pinning her hateful master beneath her.
She'll succeed one day... probably~
(Merlin is the only one who really barges in. You can read this without knowing Fate.
Although it's tagged as gender-bender, the protagonist doesn't even remember her past life, so there are no unpleasant surprises.)
