She rushed back to the common room, still in a state of shock, panic and euphoria battling within her. She did what any teenager would do in times of confusion; she confided in her friends.

She ran up to the five on the couch, almost skidding to a halt. They stared in confusion at the girl in front of them, working her jaw desperately in an attempt to speak.

"What?!" Neville seemed alarmed.

"I just found out... you guys were there, do you remember when I sang, and you all felt, well Ron said you felt," it had just occurred to her that perhaps not everyone had reacted the same way as Ron, --

"Yeah, we were all frozen, and we wanted to go stay with you, and never leave." From Neville. She nodded.

"Well that's because I'm," she paused to get herself under control, "I'm a cantamagus!" Harry, Ron, Neville and Ginny looked at her blankly. Hermione's eyes bulged as if she were too full of air, and was about to explode.

"A songmage!" she exclaimed, finding her voice. Erin nodded in excitement.

"That's why you wanted to stay with me: I was feeling lonely, and my song was a plea for comfort, and I made you stay! The song wouldn't let you leave! That's what a cantamagus does!" Now everyone else was as stunned as Hermione. "That's why even Draco couldn't help but whistle it!" she added unnecessarily.

As was only natural when in need of an explanation, all heads turned to Hermione, and she was forced to recover first.

"A cantamagus doesn't use magic. He builds upon the influence music has on the emotions, fine-tuning it to such a degree that he can actually make the listener respond with a desired action. Every form of life, even some things we don't think of as life, feels the impact of sound. A cantamagus can manipulate all of this. What they do is stronger and more widely applicable than the Imperius curse because, rather than forcing the subject to perform a task, it merely convinces them that doing that task is what they should do, or want to do." Hermione paused, and seemed to hesitate before adding, "I didn't even know they actually existed." More horrible silence. Neville's brow furrowed in thought for a moment.

"Wow." He said slowly, shaking his head.

A/N: Very short, particularly after chapter twelve, but I cut them by scene, so there.

Disclaimer (since I forgot until now): No, I only *wish* I were making money off of this.