Slightly cliché but I like the concept. Here's a prologue. I'm literally only calling it that because of how short it is.
Disclaimer: I don't own Harry Potter
"I SWEAR TO MERLIN IF YOU SAY ANOTHER GOD DAMN WORD I WILL KILL YOU. NO, I'LL TURN YOU INTO A FUCKING FERRET AND LEAVE YOU HERE IN THE FORBIDDEN FOREST TO THE MERCY OF WHATEVER THE FUCK IS IN HERE!" Hermione stood there, screaming at Draco Malfoy, face red and her eyes livid. They wouldn't be in the stupid Forbidden Forest if it weren't for Malfoy being a prick.
"Granger for fuck sake if you scream like that we're going to end up mauled by a fucking werewolf will you shut up." He hissed at her, fearful grey eyes darting around his surroundings. It was all Granger's fault they were lost here. He'd said they were going the wrong way but she insisted she was right and so, as to not cause more argument, he'd agreed to go her way, like a gentleman, and thus they found themselves in the heart of the Forbidden Forest without a clue on how to get out.
"WE WOULDN'T HAVE EVEN BEEN HERE IN THE FIRST PLACE IF IT WEREN'T FOR YOU AND YOUR STUPID PUREBLOOD SUPREMACY BULLSHIT GETTING US IN TROUBLE. YOU DON'T REALISE WHAT IT'S LIKE TO BE TRODDEN ON JUST BECAUSE OF YOUR CIRCUMSTANCE OF BIRTH. IF YOU KNEW HOW DIFFICULT IT IS MAYBE YOU WOULDN'T BE SUCH AN ASSHOLE!" Hermione threw her arms in the air.
It was him who started it. She'd just asked him for help on Head duties, duties they were meant to do together and he'd snapped at her, called her a "Stuck up prissy Mudblood know-it-all who doesn't know how to lighten up and have fun." Maybe the hexing was a bit of an extreme reaction but honestly, Hermione had never laughed harder than when Malfoy kept bleating like a donkey.
It had been in that moment, when Hermione had a duck's bill and her arms were stuck to her body, and Malfoy was vibrating and bleating angrily with webbed hands, that McGonagall had decided to walk in, ranting about "childish behaviour" and "not taking anything seriously" and "wasting your abilities on petty arguments" and had given them detention.
Their detention, however, entailed of searching for potions ingredients in the Forbidden Forest, given nothing but a crudely drawn map and a list of the ingredients needed, and thus were left to their own devises.
"What and you think being pureblood is a fucking walk in the park? Trust me, there are expectations for purebloods, and you never made that easier, because you bested me in everything, meaning my father would always punish me because a fucking Mudblood got better marks than me. I had to walk, dress, talk properly and if I did anything wrong, oh dear daddy had a thing or two to say about that. I had fucking Voldemort stay at my house, threaten me, my family. It's not a fucking picnic. So don't think you're the only one that fucking struggles. You and your perfect life with your Weasel boyfriend and Potty friend all chummy together and saving the world together, Oh HERMIONE the brightest witch of her age! Oh HERMIONE the brains of the golden trio! Oh HERMIONE SIGN MY DICK!" Draco seethed at her. She was so stubborn and frustrating! Hermione glared at him and balled her fists.
"NOW LISTEN HERE –!" Hermione was cut off by a girlish giggle. They both stopped dead. Shit her screaming is literally going to be the death of me. I'm going to die in the Forbidden Forest because of a fucking Mudblood.
A rustling to their right and another giggle chimed in the empty air. A sudden chill came over them both. They glanced at each other warily, poised to run.
"Seems like a couple of students don't know the meaning of Forbidden," a tinkling female voice reverberated in the air. Draco gulped as a tall woman with white skin stepped through the trees with an impish grin on her face. Her eyes were black with no whites, and her teeth pointed. Long jet black hair swirled around her shoulders, and she wore a cloak of black mist.
We are screwed.
Hermione and Draco stood petrified, staring at the woman, who started to circle them menacingly, like a cat and its prey.
"I wouldn't run if I were you, well, that is if you want to keep your life," she laughed again, and Draco and Hermione shot fearful and accusing looks at each other.
"Now, now, no need to be frightened. Although I take it you know what I am, so of course it's understandable. I usually just kill trespassers without a second thought. However, your little fight was quite... intriguing," Her grin widened and she stepped closer to them. "In this I see an opportunity to play a little game, have a little fun. It could provide some entertainment." She giggled again, stood behind the terrified students, making the hair on the back of their necks stand up.
"Not talking huh? Oh well, good luck, oh and try to make it amusing for me, can't let my only source of entertainment run dry now, can we? Have fun, kiddies!" with that they found themselves sinking into darkness, hearing only the bone-chilling giggle as they slipped away into nothingness.