Hiiiiiii. So, this is just an idea I thought of during class and scribbled down. Warning: It's incredibly short!

Thud!

Marlene McKinnon looked up from her transfiguration essay and saw a crumpled piece of parchment lying in front of her desk. She glanced around the classroom to see where it came from and found the grinning face of Sirius Black waggling his eyebrows at her.
Open it! He mouthed.
Marlene sighed. She stretched her arm out and picked up the note.
The words; Wanna be my girlfriend? Were scrawled hastily on the parchment.
What a prat, Marlene thought. He can't even spell the word "girlfriend" correctly.
Shaking her head, she wrote: You mean girlfriend?
She re-crumpled the paper and chucked it back to Sirius.

A few seconds later, Marlene heard the thud again. She rolled her eyes and reached for the letter.
What? Was Sirius's witty reply.
You forgot the d. She wrote, praying her patience wouldn't give up on her.
She tossed the note back to Sirius and returned to her essay, before the thud interrupted her yet again. Marlene sighed heavily and picked up the parchment.
Oh, don't worry about the D babe, she read.
You'll be getting that later…
Marlene bit the insides of her cheeks to stop the grin from spreading across her face. As much as she hated to admit it, she knew she was more amuse and delighted than disgusted by her current situation.

Marlene looked up and mock-glared at Sirius, making a series of rude gestures.
Sirius's eyes twinkled mischievously.
So, is that a yes? He mouthed.

Well, now that that's done, I just want to say: SORRY FOR THE EXTREME CRAPINESS! I just really wanted to use this idea.
Byeee :) x