A book slammed down on the desk in front of me, knocking over my flash card castle I'd nearly completed. "You were wrong."

I looked up slowly over the scattered cards and stared at Graves exasperatedly.

"Did you have to throw the book at me? You could do serious damage with one of these." I reached for the text book and dragged it towards me. Chemistry. Not my favorite but I still had a minor in it, you know, just in case I wanted to get another masters in Chemical engineering. Or something.

The girl stared back at me without flinching. Her real name was Grace Graves, but for some reason she'd always been called just Graves.

"You were wrong and I almost failed the class because of you, Winchester."

I knew she was exaggerating, but I was curious. I'm a tutor after all, I'm never wrong.

"I was wrong? Me? You dare question my genius?"

"Me? No, Drae did though. We share the chemistry book and she found an error in the chicken scratch you wrote in the margins when you helped me with this question." Graves flipped the book open with another bang and found the page, turning the book towards me.

I examined my handwriting. Chicken scratch was a generous way to describe my penmanship, but as I looked over the problem I didn't see how my answer could be wrong.

Leaning back, I sighed. Graves typically tried to stump me about once a month, bringing in all manner of off the wall questions, riddles and equations. She succeeded now and then, but never when it came to serious college work.

"I don't follow, Graves, this is correct, your buddy is wrong."

"No, in fact she is not. I handed in this homework and got that question wrong." She speared the book with her finger. "Thanks a lot D-bag. Then Drae asked to see the original question and BAM, she figured it out and got the right answer, and pretty quick too. You're losing a step, old man."

I frowned. I wasn't perfect by any means, but I was pretty damn close when it came to all things mathematical. I didn't mind being wrong, but if it meant teaching a student a flawed concept that could trip them up in the future, then that was serious and wouldn't be tolerated.

"Well, anyway, I have to go, just wanted to inform you of your fumble." Graves reached for the book.

"Hang on," I pulled out my phone and took a photo of the text book page. "I want to see where I went wrong."

"Many places, to be sure. If you need it explained, Drae is over in the computer labs."

"Who is this Drae and why haven't I heard of her before?" I knew most of her group of friends. It wasn't big but they were super close nit and downright crazy. But in the best of ways.

"Because you haven't been listening. I've known her since like high school. And I know I've told you about how we all just moved in together."

I remember her mentioning something like that. 'All' must be Graves, Stag, and this Drae character. They used the strangest nicknames, and come to think if it, I didn't know what their birth names actually were…but I knew of Stag, of course, she was a cheerful red head that was dating my best friend, the absentminded writer, Castiel.

"I guess I just have better things to think about." I said and dodged Graves' backhand.

"Well you can go say hi if you get stuck on that question you failed at." Graves said, scooping up and adding the text book to her arm load of notebooks and binders. "Catch you later, Sammy!"

"Bye Graves." I waved. Then I opened my phone and grabbed a stack of scratch paper, settling in to play games with numbers.