With excitement, because she's naked too

Kevin's jaw dropped to the ground as Sarah came running up to him, wearing nothing but her backpack over her shoulder. She had an impossibly large smile on her face, as if she was greeting a long lost friend. Her blonde hair bounced over her shoulders, almost in rhythm with her moderate breasts.

"I can't believe you came here naked too!" Sarah said. "I thought I was the only one doing the whole 'legally nude' thing!"

"Uh...wha...gah!" Kevin could hardly make out a word. His friends were just as shocked as he was.

"Man, this is such a relief!" Sarah came in for a sudden hug, pressing her firm breasts against Kevin's chest as she did so. Kevin stiffened and made a small squeal of surprise, begging himself to keep from getting a boner.

Sarah broke away and made a mock look of disappointment. Of all the members of their group, she loved to tease them the most. "Really? Only one of you is doing this? I thought you guys were supposed to be the fun ones from school!"

Kristy avoided eye contact, focusing on straightening her lacrosse uniform. Michael pulled on the collar of his polo shirt and rearranged his jeans, poorly hiding his own erection. Casey grabbed a nearby newspaper and used it to hide her face. Pajamas were one thing, but nudity made her even more uncomfortable than her friends.

"Um, a-actually, I have a c-confession to make," Kevin stammered. "I, uh, lost a bet this summer. A-And now, I have to go...n-n-naked."

Sarah looked back at him in surprise. "Oh. Really? Well, it's nice someone is still doing this with me, but I thought you'd be more, I dunno, brave."

That kind of stung Kevin to hear. He tried to laugh it off. "Yeah, right. I'd never be brave enough to go naked in public otherwise. C'mon, you really think anyone would want to see this?"

"I dunno. I'm liking it quite a bit."

Kevin lost his train of thought again at hearing that. Was she teasing him again? Or was this a more blatant flirt?

Before he could talk again, Sarah grabbed his hand. "Well, no time like the present. Let's get this day started!"