Disclaimer: Clearly my writing doesn't come close to comparing with the works of J.K. Rowling or Tamora Pierce whose ideas I borrowed for this little story. All I did was put them together.

The Sexus Mutare Charm Chapter 1: Betrayal and Brilliance

"God dammit! Aargh!" Hermione Granger screamed as she slammed her fist into her bedroom wall, a large hole appeared, along with blood on her knuckles.
"Stupid bloody bastards!" She kicked another hole in the wall, before the pain registered with her.
"Ow! Ow ow ow! Oh crap!" She collapsed on her bed clutching her foot and hand. She lay there a moment before a fresh wave of anger washed over her.
"Those assholes! I can't believe them! How? How? How could they do this to me!"
Her large ginger cat, Crookshanks, who had been trying to sleep raised his head and glared at Hermione.
All right, okay, let's try not to smash anything else. What happened?
It had been a recent shocking disovery of Hermione's that when Crookshanks yowled, it sounded like words to her.
"Ron and Harry! Those stupid-"
Calm it down and just tell me what happened.
Hermione took a deep breath.
"Ron and Harry have gone to Torquall!"
Torquall?
"It's a castle in Northern Scotland. Very isolated and impossible to find. It offers a highly exclusive program for students just finishing school. You learn about very old forms of magic...how to do magic without a wand, just the power of your mind. It's the only place that teaches magic like that. Also physical combat, like sword fighting, kick boxing, wrestling, et cetera. And Harry and Ron have gone there and joined the program!" Hermione screamed as she paced her bedroom, trying to walk off the pain.
So?
"So? SO? They only accept boys! No girls are permitted to join! They believe girls can't handle the work load! And Ron and Harry-RON AND HARRY! My supposed best friends-have abandoned me and joined the program! How could they do this? Go off and abandon me? After all that crap about becoming Aurors and working together!"
Hermione flopped down and stared at her ceiling, trying not to cry.
Crookshanks sat next to her and look down at her.
Well, that is pretty low. So, what are you going do about it?
"What do you mean? What can I do? I'm not talking to them for awhile, that's for sure! And they wrote me letters." She waved her hand at Pig and Hedwig who sat on her windowsill. "They're all excited! No one word about how they are sorry or anything! Listen:" She grabbed Ron's letter and began to read aloud.
"'Hermione-
You'll never believe this! Harry and I applied to the wizarding program at Torquall and got in! We're going to spend nine whole months studying! I know it doesn't sound like fun (well, not my kind of fun), but by the end of it we'll be a couple of the toughest, most powerful wizards ever! Write and let me know what you think!
-Ron'
"And Harry's isn't much better.
'Hermione-
This is just a quick note to let you know what is going on. Ron and I are going into the program at Torquall. I've heard great things about it. I'm not exactly looking forward to all the work but they do have fantastic flying lessons. Write me, since I won't get to see you during the first year of Auror training. Maybe you can come visit for Christmas or something.
-Harry'
They don't even care!" Hermione was crying now. "They hate studying and I love it and they know it and they don't care! Well, I'll teach them. Go on!" She yelled to the owls. "I have no return letters, so go back to your oblivious backstabbing owners!"
They took off and she sat down on her vanity stool. She frowned at her image in the vanity mirror. Hogwarts was over and she and Ron and Harry were supposed to be going to the Auror Academy to begin training for their future. They were the Trio, the annoyingly inseperable threesome of friends. They had fought all kinds of evil, fought teachers, fought each other...and now Harry and Ron had gone off to completely ruin their dymnamic!
The rational part of Hermione knew that this wasn't a personal jab. That they were just stupid boys that didn't realize they were hurting her. Harry was getting desperate; the pain of Sirius' death two years ago was still strong and Voldemort was growing ever-powerful, his dark presence could be felt everywhere.
But that wasn't important. They were still supposed to be her friends and they were going off to a place that she could never hope to go. She wanted to be with them. Hermione needed to be prepared as much as anyone. Apart from Ron and Harry, she would have loved to go and learn from the Masters at Torquall. She almost wished she hadn't registered her Animagi self with the Ministry. Then maybe she could slip in as just some little black kitty, unnoticed in her disgu-
"Wait! I could-! But no they'd-! But if I I could hide-! And change-! Then they wouldn't-!"
What? What are you babbling about now? Finish a sentence!
"I can disguise myself as a boy! I know I read something..." Hermione began pulling books off her shelves and flipping through them. "Here! Here it is! The Sexus Mutare Charm. It's a Charm, put in the form of a pendant that changes your appearance to that of the opposite sex. It's perfect!"
You're going to become a transvestite, all to get the better of Harry and Ron?
"No, I'm going to do it for all the knowledge I can gain"
What about Harry and Ron? They know you and they'll recognize you by how you act! You don't know how to act like a boy!
"Ron and Harry would never expect this from me. They wouldn't think I could ever do something this daring." She grinned. "And as for acting like a boy...I think I know who I can call on for help with that."
She strode over to the fireplace and reached for the Floo powder. "I think I'm going to go shopping. I suddenly have a great desire for Canary Creams."

A/N.Okay, well...for anyone who read this story before and is going "huh?" this is a REVISION!! I got to a point in the other version of the story and realized I had no idea how to go farther. Don't worry, this one will go much faster than before...at least I'm 99% sure that it will...just...bear with me... Comedia