A/N: High School AU anyone! Basically everyone's favorite really. I was struggling with this at first but then I found a secondary prompt that was too perfect. This was a lot of fun and I might continue this one if enough people enjoy it. Sadly winter break is ending and I have to head back to school soon. Ugh… job searching, classes, work and no time to write fanfic. :( Well, enjoy one of the last fics for a long while. Remember to review too!

Prompt: HS popular kid + nerd + 'i thought you're my girl and i pulled you in the janitor's closet au'

Just a Mistake

Reyna balanced her books on her knee as she slammed her locker closed. She had so much to do today. There was a huge AP history project due in two days. The girl loved Mrs. Athena and her class, but the woman was a hard-ass. She was especially hard on students who have so much potential. She sighed as she pushed a bit of her dark hair out of her face. Some days, Reyna hated being an honor student.

"Rome project, two chapters of 1984, pre-lab worksheet," Reyna listed as she walked down the empty halls of Olympus High. She was going to be holed up in the library all afternoon. The young woman was so lost in her thoughts; she didn't feel the hand grabbing her forearm. Reyna squeaked, dropping her books when someone pulled her into a dark space.

"What?" Reyna cried out, noticing the bundles of paper towels and a mop, before a pair of lips slanted over hers. They were soft and chapped, pressed gently against hers. A warm callus hand tilted her chin to the correct angle. Reyna couldn't stop herself from responding to the kiss, it was that good. She stood on her tiptoes, pressing her hand gently against the kisser's chest, feeling firm pecs underneath her fingertips. His hand curled around Reyna's forearm as he stepped forward, gently pressing Reyna against the door. The knob dug in her back but she didn't care, responding to the kiss even more. It was overwhelming, hot and heady. She curled her fingers against his side, needing something to hold on to.

He pulled back, wrapping his strong arms around Reyna's slender waist, resting his forehead against her shoulder. Warm puffs of breath fanned the side of her neck. Reyna leaned against the door, needing something to hold herself up. Her legs were wobbling from the heated kiss. For once, her mind wasn't buzzing with thoughts of homework, clubs, and stress. She stared over his broad shoulders, noting the wisps of blond hair her fingers were threading through.

"When did you get so tall, Piper?" A husky voice murmured, fingers twisting the end of her braid. Reyna stiffened instantly, dark eyes widening as she recognized the voice from one of her classes. She quickly shoved the young man away. A pair of bright blue eyes stared at Reyna in confusion before his mouth gaped open. "Reyna?"

"Fuck." Reyna swore as she stared at Jason Grace, handsome Jason Grace, star quarterback, student body president, and boyfriend of Piper McLean. She pressed her hands against her temple, shielding her eyes as she thought. "My god, what the hell, Jason? Do you always drag unsuspecting girls into janitor closets for a make-out session or is it just me?"

"I... I... I thought you were Piper!" Jason exclaimed, taking a step back as he ran both his hands through his golden blond hair. It tugged his t-shirt up, revealing a sliver of his abs. Reyna crossed her arms, trying to look anywhere but at Jason.

"Idiot, in what way do I resemble Piper?" Reyna countered, shooting him a deadly glare. Piper and Reyna were polar opposites. While Piper was petite and curvy, Reyna was tall, lean with subtle curves. Piper who wore the latest fashions provided by her supermodel mother, Reyna settled for something comfy and practical. Piper was beautiful without trying while if Reyna wanted to look that good, she needed to spend hours applying makeup and coordinate her outfit. In Reyna's mind, she and Piper were leagues apart.

"Your braid." Jason coughed, covering his mouth with a sheepish smile. He was intently focused on his shoes. Reyna let out a hallow laugh as she shook her head. Jason lifted his head, watching her intently.

"Oh, my braid. We just happened to wear the same hairstyle. Of course." Reyna murmured sarcastically, trying to ignore the disappointing pang in her stomach. She crossed her arms, fingers clenching her elbows as she looked down at her shoes. "Because who would want to kiss nerdy Reyna?"

"Don't say that!" Jason ordered, taking determined steps towards her. He invaded her space easily, slapping the door beside her head. Reyna's head snapped up, staring wide-eyed at him. His piercing blue eyes were intensely focused on her like he was actually seeing her for the first time in years. The heated look he gave her made Reyna want to reach out and pull him into another kiss again. "Don't say that." He whispered this time, soft and gently. He reached out, tucking a piece of her stray hair out of her face. His thumb brushed the apple of her cheek as he pulled back. Jason's eyes dipped down focusing on her lips. Reyna unconsciously wetted her lips. "Don't do that either."

"Do what?" Reyna panted, trying not to think. He was close, closer than another girl's boyfriend should be. Her teeth bit the bottom of her lip. Jason groaned, pressing his head against the door as he shook it. The heat from his body was overwhelming.

"Anything involving your lips?" Jason whispered, breath caressing her ear. "It's distracting. I can't think. It only makes me want to kiss you again." Reyna bit her lip even more after that comment, knowing he can't see it now. She nodded her head, knowing he could feel her move. "Don't ever say that, Reyna. Anyone would be lucky to kiss you. I can attest to that. It was a good kiss."

"Good to know. I'll put you on my reference list." Reyna replied, trying not to laugh at how crazy this situation was. She softly pushed Jason away, needing a bit of space. This was way to intimate. "Piper's a lucky girl." The dark look in Jason's eyes receded for a moment. "I won't say anything to her. This was a mistake." Jason nodded his head as he took another step away. Reyna gave him a friendly smile before she turned to open the door. "A very hot and steamy mistake." She murmured, pushing the door open and missing the heated, longing look from the boy in there.