Don't know how this idea came to me-.- Sorry for mistakes! This is set in James + Lily's time. I don't know whether the headmaster was Dumbledore or Dippet so in this, it's Dumbledore.

"Sirius, James, she said yes." Lupin shrieked as he came running into Gryffindor common room. Both Sirius and James looked completely dumbfounded before remembering that she didn't know Lupin's dark secret.

"That's great." James said, beaming. Sirius, however, looked more concerned.

"Isn't she going to get suspicious? You won't be able to go to the yule ball because that's be arranged on a full moon." Sirius asked. Lupin's face fell.

"I forgot about that."

"We could ask Dumbledore to move it though." Sirius suggested, feeling guilty for making Lupin feel bad. "Come on Moony, we'll go now."

"Shouldn't we wait for Wormtail?" Lupin asked.

"Nah." James said. "Plus, if we hurry, we can catch Snivellus. Did you know he called Lily Evans a mudblood?"

"What?" Lupin gasped. Sirius just gawped.

"That's what I thought. How dare he?" James muttered scowling. "She still won't go to the yule ball with me though."

A little shuffling sound above indicated that Peter had just finished his homework. "Come on, let's go." Sirius said and they hurried out of Gryffindor common room.

Lily stared at her homework, trying to ignore the echoing voice she heard in her head. "Mudblood." It echoed and Lily shivered. Tears pricked her eyes and she blinked quickly, trying to get rid of them. Snape had always stood by her side but now, now he'd turned on her and called her a mudblood. Why, she was unsure. Had it been because James had asked her to the yule ball or because he repeatedly kept trying to get her to be his friend or more. A single tears dripped onto her parchment and she rolled it up, marching from the library and up the moving staircase.

"Snivellus." Snape froze as he recognised James' voice. "Why did you call Lily a mudblood?"

"Because that's what she is." He said coldly, shutting his potions' book.

"Maybe she is muggle born but that doesn't make her any different than any of us. And it is not acceptable to call her a mudblood." James snapped.

"I don't care whether it's acceptable or not, she IS a mudblood." Snape's voice was bitter and his eyes were staring at James, hatred flooded through his face.

"James is right, it's NOT acceptable." Sirius said. The look on his face made Snape flinch slightly, thinking he was going to punch him.

"Whether it's acceptable or not, she IS a mudblood." Snape repeatedly. His eyes flashed with horror as his eyes flickered towards the staircase but it only lingered for a second.

"I hate you Severus." Lily shouted, tears pouring down her face. She hurried up the stairs and James glanced between Snape and Lily, trying to decide where to go. Sirius decided for him. He turned back to Snape and nudged James. "Wingardium Leviosa." Sirius laughed, casting the spell and watching Snape dangling in the air.

"Wingardium Leviosa." James said aiming for Snape's underpants. Sirius dropped his wand and laughed as he saw Snape hanging from only his underwear. James moved Snape through the air and hung him onto a lamp by his underwear. "Never call Lily a mudblood in front of me." He warned him coldly.

James, Sirius and Lupin turned and headed for Dumbledore's office. "Sherbet Lemon?" Lupin said but the eagle did not move.

"Acid pop?" Sirius suggested. It still didn't move.

"Flibbertigibbet?" The eagle still didn't move.

"Animagus!" Lupin exclaimed, remembering Dumbledore telling him. The eagle sprung to life and the three friends pounced onto the staircase.

Lupin knocked on the door sheepishly and Dumbledore's voice echoed through the door. "Come in."

"Erm.. Professor Dumbledore.." Lupin began.

"...Can you change..." Sirius continued.

"..The yule ball date?" James finished. Dumbledore stared at the best friend's in shock.

"Why?" He asked curiously.

"Full moon." Lupin replied gloomily.

"Ah." Dumbledore said. "I will have to see."

Lupin's face fell further. "Do you have someone you'd like to take?" Dumbledore asked, raising his eyebrows. Lupin nodded, blushing. Sirius and James fell in fits of laughter. Then something out the window caught James' eye. "Moon- I mean Remus, we, I mean you need to leave. It's a full moon tonight." Lupin's eyes widened and he hurried from Dumbledore's office, saying a quick goodbye.

"We need to get Wormtail." James muttered to Sirius as they hurried up towards Gryffindor common room after they watched Lupin run towards the whomping willow.

Hope you like it=]