A/N: AHAHA I'm such a nerd. Okay since I'm overly excited for the release of the Half Blood Prince and most people know it's based kinda around Snape, I decided to create a fanfiction. I was actually a little leery about uploading this because I was looking at a picture with an oc and snape and someone had commented how they thought it was stupid people make up oc's for Snape. It sort of set me back but I decided if people don't like it then just don't read it. This is going to take place in Harry's fourth year. There will be a Yule ball but I'm not going to follow the book exactly.

A quick description of my OC

Name: Monica Devereux

Age and Birth date: April 16th, 1976. (17)

Year: Sixth (She skipped a year and started later)

Looks: Long blonde hair, bluish grey eyes, Fair skin.

Personality: Loves adventure, very energetic, courageous, confident and enthusiastic. Sharp and quick-minded, fiery, passionate and expressive. Quick-tempered, impulsive and impatience.

Interests/Skills: Artistic, good at Transfiguration and charms, okay at potions.

As far as I was concerned, boyfriends were out of the question if I was to pass my OWLS and NEWTS. I'd never had one, and I didn't want one. Not till now. I could feel that funny flip-flop feeling in my stomach whenever I saw him. And the worst part was, the person I thought I hated, ended up being the one I fell for. I kissed a boy before, it wasn't anything new, but when the soft lips connected with mine it wasn't like kissing another boy. You know the feeling you get when your on a roller coaster ride and they go down a steep drop. That's what I felt, and I liked it. Hugging my parents and friends were normal, but when I hugged him, we fit together like two pieces of a jigsaw puzzle. I didn't understand how it could've happened. He was the least likely person I would ever in all my life thought I'd feel for. But it happened and I can't deny it. Or can I?

Platform 9 and ¾.

Smiling widely I ran though the magical barrier and exposed myself to the other side. I came face to face to the wonderful red train that took me to the best place in the world: Hogwarts school of Witchcraft and Wizardry. I was in my seventh year and well on my way to graduating. I was an expert at Transfiguration and was skilled in charms. I boarded the train and carried my luggage to an empty compartment. I placed all my belonging in the compartment between the cart I was on and the cart behind me where the luggage was kept. Settling into my seat, I looked out the window waiting for the train to start moving. I few moment later I heard a familiar voice ring through the air.

"Ron would you quit going on about the Quidditch match!"

I smiled heading for the sliding door and thrusting it open.

"Hermione!" I cheered, and her frizzy brown head of hers swirled in my direction.

"Monica!" she cried and we both ran to each other for a hug. After letting her go a glanced at Harry and Ron.

"Well boys?" I said placing a hand on my hip and awaiting my greeting.

"Hey Moe," said Ron and Harry nodded and waved.

"You guys are such party poopers," I said walking over and planting two huge kisses on each of their cheeks.

"Come on Moe!" said Ron wiping his cheek. "I get enough of that from my mom."

"So my friends how was you're summer," I asked after the organized their luggage and took their seats in my compartment.

"Uneventful," said Ron and I knew he was lying.

"Fine, Harry?" I asked, knowing I couldn't gain information from him.

"Well other than the bizarre Quidditch game we just went to."

"What happened?" I asked.

"Well, after the game Harry ran into someone and then the Dark Lord's mark filled the sky." explained Hermione.

"Really," I said in hushed astonishment.

Just then our compartment door opened to reveal a flustered Neville Longbottom.

"Oh Moe! Sorry I didn't realize this cart was taken. Hey Harry, Hermione, Ron."

"Well Neville if there aren't any empty seats you can sit with us," I offered scooting closer to Hermione to make room for Neville.

"No I'm fine I'm sure there's one ahead. See you at school."

I glanced at my watch. 10:58.

"Good we're about to leave."

"Well aren't you excited to get back to school," said Harry.

"I'm on my way to graduating I'm so excited!" I said and I saw Hermione's face falter.

"Oh that's right, you're 17," she said softly.

"Oh, Herms don't be upset. Who knows maybe Dumbledore will offer me a job after my last year," I said smiling and rubbing her back.

Harry and his friends were three years younger than me. Hermione had looked up to me since her second year when I helped her with Transfiguration.

It was funny thinking back on the times we spent together. All those horrible double potions they had to endure with that nasty Draco Malfoy.

I remember Hermione telling my about how she'd punched him in the nose in her third year after he called her a Mudblood.

"Well, well if it isn't the Mudblood and her half-blood homework helper. Not to mention Potty and the Weasel," said a sickening voice coming from the door of our compartment.

"Can it Malfoy, in case you've forgotten you precious teacher had a muggle father," I said turning slowly to glare at him. As usual Crabbe and Goyle were next to him looking smug as ever.

Malfoy only smiled and leaned against the doorway.

"Oh right I almost forgot, almost like how I forgot that you-," but he was cut off by a sudden jolt of the train. I watched Malfoy practically fall over until a pair of hands caught him before he fell.

"Mr, Malfoy, I'd advise you to get back to your seats before I escort you there myself," said a cool voice that I quickly recognized from my many years at Hogwarts.

"Any trouble here?" asked Snape hovering in our cart's doorway.

"We're fine, thanks," I said coldly, gritting my teeth. I took all my strength to hold back a glare.

"Very well," he said closing out compartment door and leaving to wherever he was headed.

"God he makes me irritable."

"We can see that, jeesh you were like a crazed grizzly bear protecting her baby," said Ron jokingly.

"I was not," I said defensively, feeling my harsh mood lifting immediately.

"You really were, it's was kinda scary, maybe you should be in Slytherin," said Harry.

"An have to put up with him! I think not," I exclaimed huffily. I crossed my arms and scowled, causing an abrupt laughter from all three of them.

"Shut up, you guys. It's not that funny."

"Aw Moe, Hogwarts is never going to be the same without you," said Hermione hugging me.

"Well then let's make this year last," said just as the train pick up it's full speed.