Sorry the stupid thingy wouldn't let me reply back to your comment lol.
But well .. it's a small idea I guess you could say.
So this girl, her name is undecided by the way, never fit in. She was made fun of in elementary school and middle school because of her weight. But over the summer she changes all of a sudden. Like wakes up different than how she went to sleep. So when school starts again nobody knows who she is. She's finally making friends and all but then someone starts sending her secret messages about her unidentified powers and what she has to do with them. So basically she realizes to get over the past, she has to help those who hurt her. That's where the title Beauty and the Key comes in. It may sound strange I know but it's just a thought. If you'd like to give it a shot I'd like to hear your ideas if you have any. :)