Math; teacher is exasperated, but resigned

Everyone in this class was there, except Kiyomi and Nikki; of course she had told this class that they wouldn't have to wait around in the hallway for their surprise, because it would come to them instead. Immediately, Kiyomi could feel the stares on her naked skin. Instead of loud laughing and cheering, there was excited whispering and snickering. Was it always this much of a spectacle, Kiyomi wondered? Shouldn't they be used to this by now, if it was done for every cheerleader?

Finally, Mr. Green stopped his lazy scribbling on the blackboard and turned around to them with a sigh.

"Nikki, Kiyomi, you're five minutes la-" And now he took in his students outfit. "What the- look, we've seen what you wore all week, and it was fine, technically, but this, honestly-" Kiyomi panicked a little, but couldn't get herself to say anything - instead she followed her instincts and bowed deeply, maybe not a common gesture here, but her teacher would understand. In the process, the class got an even better view of her bare bottom. Even though that wasn't the most humiliating thing happening today, the hot blush in her face intensified.

Mr. Green sighed again, and made a dismissive gesture. "...fine. Whatever. Just sit down, I want to get on with our hyperbolic tangent."

As Kiyomi hurried to her seat, relieved to have dodged a reprimand for now, Nikki patted her on the back and whispered: "Well done. You're doing great!" It was a welcome encouragement, but it did almost nothing to alleviate how embarrassed she felt. As she sat down, the cool surface of her chair caused shivers down her spine. Stares were still fixed on her. Not only were her half-covered boobs still visible from the side, but from behind, everyone could see her butt cheeks pressing down on the chair. And now that Mr. Green was occupied with the blackboard again, nothing was keeping them from sneakily taking pictures. Kiyomi could already imagine the captions: 'Shameless exhibitionist naked in school', 'Asian slut shows off pussy and butt in class' or something similar. Her face was growing ever hotter, imagining her shame being spread on the internet like that.

Her other problem was increasing in intensity, though. The itch was getting unbearable! It was everywhere she had put that white powder. Her pussy lips, her clit, and all the way inside. Kiyomi's body was desperately telling her to scratch, but she couldn't, not with everyone staring and potentially recording her predicament! She did not want to add 'shameless slut masturbates in class' to the captions.

Maybe it would get better if she tried rinsing the area with water? Or putting something cold against it? Hopefully that wouldn't be against the rules of the challenge. But she had to try, enduring it just was not possible. Her only obstacle was getting permission from Mr. Green. She doubted there was much goodwill left...

"Uhm, Mr. Green?" She raised her hand in addition, as she didn't want to just speak up in class like that.

"...yes, what-" He had just turned around, but already he closed his eyes and once again gave an exasperated sigh. Was he still frustrated about her outfit? "Kiyomi. Why are you showing me your nipples?"

Her top. She had forgotten about her top! Her breasts were completely exposed! With a mortified gasp, she lowered her hand, and pulled it down again. This wasn't as critical as her pussy, but it was the only intimate part of her that they hadn't seen yet. Maybe nobody was quick enough to take a picture, at least.

A useless hope, of course; many were holding their phones in recording mode out of sight of the teacher, so they captured everything. A few even had HD-camcorders with them. Those would come in handy later.

"Please, just stay quietly in your seat and don't cause any more commotion..."

With that, the teacher turned to the blackboard again. Kiyomi didn't even get to make her request. And the itch wasn't subsiding...