Disclaimer:
Oh, if only I was as brilliant as JK Rowling.

xoxoxoxoxoxoxoxo

"You're a lady killer, Sirius Black," Isabella Willows said, tracing circles on the bare, warm skin of said lady killer's chest. He shivered delightfully despite the flushed feeling being so near to her gave him. She lay contentedly on her side beside him, his left arm secure underneath her and her head resting on his chest. She smiled slightly when she felt him breathe out a short, amused laugh.

"Mm.. I like the sound of that. Damn irresistible, aren't I?," he grinned jokingly in return, pulling her nearer to him and caressing her arm gently. She bit her lip; it was true, of course. Sirius Black was a lady killer, the most sought after specimen of the male species in all years and all houses (yes, even Slytherin) at Hogwarts. She just wished it wasn't true sometimes. Sometimes, she wished that he was all hers. Of course, that wasn't part of the agreement. The agreement was that this happened once a month, twice maybe if they were both having particularly bad months.

Sirius had a girlfriend, a 7th year Ravenclaw by the name of Madison Lovejoy. She had a shapely, petite figure with legs that went on for days. Her face was stunning, breathtaking even, with green eyes and pouty pink lips. She and Sirius complemented each other perfectly. You looked at them and thought to yourself, "Those two'll have the most gorgeous children." Indeed, that was what Isabella thought every time she saw them together. They had been together since the start of the term, and it was nearing the end of January already. It was a record for the both of them. Being so popular amongst the opposite gender, neither of them stuck with one person for very long before moving on. But she figured that beautiful people liked to stick together; it was how more beautiful people were made.

Usually Isabella felt inadequate. She was the absolute epitome of a plain Jane. She was only marginally brighter than most people in her classes. She wasn't ugly, but she wasn't the kind of girl that made you do a double take when you passed her in the corridors. She was very sweet looking, sort of like the girl next door without the appealing charisma. She kept to herself mostly, being only distant friends with most people, even the girls who shared the 7th year Gryffindor dormitory with her. The only person who Isabella considered a close friend, was also one of Sirius' best friends: Remus Lupin. They had met on the train in first year and had instantly clicked. The both of them were used to feeling isolated so when they met, they had clung to each other for comfort and friendship. Sometimes they were assumed to be siblings, or at least very close cousins.

Isabelle sighed comfortably, cuddling closer to Sirius as ran his fingers through her light brown tresses. He kissed the crown of her head, releasing a sigh of his own, only his was much more resigned. She knew what was coming next. She recoiled emotionally, steeling herself for his words. But she was still unable to physically pry herself away from his bare body that pressed so wonderfully against her own.

"I have class tomorrow morning," he said as his hand fell away from her and landed on the pillow beneath their heads.

"It's the middle of the week, Sirius. Everyone has class tomorrow," she returned quietly, already beginning to try and remember where her various articles of clothing were discarded. He merely sighed again and pulled his arm out from beneath her. She nearly whimpered from the loss of contact as he sat up and began reaching under the bed curtains in search of some article of clothing. Eventually, he straightened up and tossed the uniform shirt he had been wearing before they fell into bed together at her. She held the comforter around her as she positioned herself into a seated position and took the shirt with a useless nod. He promptly removed the imperturbable charm on his curtains and she pulled them open quietly and set her feet on the cold floor. She noted that Sirius' shirt reached just past mid-thigh when she stood.

"I'll get your clothes back to you when I find them," he whispered, seeming heartbreakingly eager for her to be gone. She nodded wordlessly again and padded gently out of the boy's dormitory, routinely ignoring the predictable tears clawing the backs of her dark brown eyes. She bit down on the inside of her cheek and vowed to never end up in Sirius Black's bed ever again.

She noiselessly pushed the heavy wooden door of the girl's dormitory open and tiptoed to her bed, the second one from the door. She curled up beneath her cool comforter, unable to forget the warmth of Sirius'. She wiped her cheeks pathetically and her bottom lip quivered from suppressed sobs.

A light tapping at the window frightened her into releasing something between a gasp and a strangled sob. She glanced over at the waiting tawny owl and rubbed at her face to erase the proof of her crying as if the owl would return to its owner with reports that she had been wasting tears on him. She rose from her bed, digging out an owl treat from her bedside table before letting the bird in. The owl flew in and around the room before dropping a note on Isabella's bed and immediately flying back out. Of course, just like its owner, it had no desire to remain in Isabella's presence after it had done what it wanted to do. Isabella glared out at the barely rising sun and almost angrily flicked the owl treat out the window after it before pulling it shut and returning to her bed. She crawled under the covers before picking up the note and reading it.

Until next month, Belle.

Of course. It seemed he knew just what she was thinking every time she left him because for the past year and a half, since the agreement was made, he sent these notes to her and shattered her will to leave.

xoxoxoxoxoxoxoxo

Author's Note:
So I don't really know where I'm going with this story.. I only have a vague idea formed in my exhausted little head. I was in the middle of reading a fan fiction when I decided to sit down and write this one. It's a little heavier than what I'm used to writing, but I figure the story will lighten up a bit as it progresses.. Or at least that's what I'm hoping. Let me know what your thoughts on this story are, my dear potential readers (: I look forward to hearing from some of you!

Happy reviewing! :D

Coming Up:
We'll learn more about The Agreement and Isabella's relationship with Remus and others. And we'll probably get to see a little bit more of Sirius' relationship with Madison. I think. Hahah, again, I only have this story kinda mapped out.