So this is my first fan fiction… please go easy on me! But I would love your reviews

Set a year-ish after season 4, with a girl Stiles. I will (hopefully) be adding a new chapter every day or so.

Chapter One

It was a big night for a few reasons. Not only was it Stiles 18th birthday – it was the first day of Spring Break, and Lydia Martin was throwing one of her famous go-big-or-go-home parties to celebrate the two coinciding occasions. It had only been a month since Lydia had turned 18 and had thrown a ridiculously extravagant party for herself, of which Stiles was sure her body was still recovering from, but Lydia refused to relinquish the prospect to throw a party for her best friend. They were finishing school in two months and the opportunities to bring her classmates together were growing fewer as graduation neared.

Stiles had never really been one for large social gatherings, yet lately she had been conditioning herself to enjoy life. It had almost been a year since anything major had occurred in Beacon Hills. No Alpha Packs, no Deapools, Peter Hale was still imprisoned in Eichen House, her relationship with her father and friends had never been better. Everything was going great. Except one. Stiles was still a virgin.

She'd never had the chance to lose it during all the chaos after her best friend Scott was transformed into a teen werewolf, and since then she'd been too focused on getting her grades up and stabilizing her life to even think twice about sex. She wasn't particularly interested in having a boyfriend or falling in love or any of that crap Scott was always going on about, she just wanted to have sex. So, it being her 18th birthday, Stiles didn't see why that night couldn't bet the night she finally got her wish.

She arrived at Lydia's in the afternoon to help set up – to ensure Lydia didn't go too over the top with the decorations – and also to get the beauty treatment. Stiles was hopeless at putting on makeup and picking out attractive clothes to wear, so she let Lydia do all the work. Stiles didn't have the "sexiest" figure to work with; she was all skinny and flat in the areas that meant the most. Ultimately, for Stiles Lydia settled on a pair of tight leather leggings with matching black wedge heels and a red crop top and lipstick to match. Stiles felt uncomfortable with her stomach showing and heels so high she thought her head would hit the ceiling, but Lydia assured her it would attract the boys.

They had a few glasses of celebratory champagne, which Stiles found disgusting, yet drank it anyway because Lydia was, and turned up the music as the guests started rolling in. Scott, Kira, Malia and Liam were some of the first to arrive. They all raised their eyebrows at the site of slutted-up Stiles greeting them.

"Wow, Stiles, you look …" Scott trailed off, eyeing his best friend, whom he honestly sometimes forgot was in fact a girl.

"You look fantastic!" Kira finished for him. "Happy birthday!"

"Yeah … fantastic. Happy birthday, Stiles." Scott said, still befuddled.

"You look like a prostitute." Malia said blatantly.

"I'm going to try and take that as a compliment!" Stiles beamed optimistically, or maybe it was the two glasses of champagne. Either way she didn't care – she had a good feeling about that night.

It didn't take long for the night to get slightly out of hand. Lydia invited way more guests than Stiles had permitted, but at that moment Stiles was much too inebriated to care. She knew most of the people were only there because it was a Lydia Martin party, not for her.

She, Lydia, Kira and Malia stood by the pool, scanning the scene for a potential hook-up for Stiles. In her effort to seem more laid-back and cool, Stiles had drunk a lot of alcohol. A LOT. Her mind had shifted from thinking about sex to focusing all her might to stay upright. She just wanted to sleep. She tried to listen to the sound of the girls suggestions for guys, but she was fading. Her alcohol soaked brain concluded that she needed a shot of tequila to pick herself up.

She snuck away from the others and headed inside to the Martin's billiard room where she knew all the hard liquor was stored. After downing a shot – or two – of tequila, she did indeed feel a pick up, but it was her lunch trying to pick itself out of her stomach. As the nearest and safest place to hurl was a few metres away in the Martin's rose bushes by the front door, Stiles slid across the floorboards on her heels like a giraffe in roller-skates. She ripped open the heavy front door and successfully directed her vomit into the garden. She felt sorry for the roses, but it was better than throwing up on the floor inside or missing the toilet bowl.

"Are you alright?" she heard a man's voice say. She quickly wiped her mouth and spun around to see Derek Hale walking up the front driveway towards her. He stopped mid-step when he saw who the party girl before him was. It was Stiles. Flannelette wearing, clumsy, hyperactive, boyish Stiles. But this Stiles was, dared he think it, sexy. The high heels and tight leather leggings showed off her skinny legs. Legs that were usually covered by jeans or hidden under a baggy shirt. He was taken aback.

"Derek?" she squinted at him, her vision blurry. "What are you doing here?"

"I … was actually looking for you," he said, still caught off-guard by Stiles appearance.

"Me? What, you don't know how to use a phone?" she asked.

"You don't know how to answer one?" he snapped back. She realized she hadn't checked her phone since before the party began. She fumbled around her thighs trying to find her phone but she remembered she didn't have any pockets. It must have been inside.

"What do you want? Don't you know it's my birthday? I'm trying to get laid," she said, slurring her words. Derek raised his eyebrows.

"Maybe I should talk to you tomorrow," he said, and began walking back the way he had come.

"No no no no no, wait!" Stiles called, chasing after him quite pathetically. "Say what you wanted to say."

Derek sighed, "I just…need your help."

Stiles laughed, "Look at that, the great mighty Derek Hale needs my help."

Derek tapped her shoulder lightly and she wobbled, almost losing her balance.

"Not cool!" she huffed. "Fine, I'll help you. But I'm probably going to need tomorrow off to recover. Monday morning, call me."

"Alright," Derek shook his head, and continued to walk away. "Drink some water, Stiles."

Stiles watched as Derek disappeared into the shadows. Damn if he wasn't fine as hell, she thought. But such a sourwolf, what a shame. She turned back to the party raging inside and took a deep breath, determined to complete her night's mission.