Nothing. She's gotta get her panties.

Anna glanced at the empty palms of her hands, feeling her heart racing. Somehow she had missed grabbing her panties. She glanced behind her, seeing the light pink undergarment still sitting there, unclaimed by its owner. Anna clamped her legs together, feeling more nervous.

She had gotten up and achieved nothing. Anna was lucky to be unnoticed before, but now she felt like that luck was wasted. The slight bit of warmth between her legs reminded her of the problems she was facing with her clothes.

With a quick glance around the classroom, Anna saw that the movie was about practical applications of some of the math they were learning. A few other students were watching it, faking interest. A couple of the ones nearest to her had put their heads down for a nap.

Anna felt like her heart was going to jump out of her chest, and she couldn't believe her luck. There was another chance to get her panties. So, as quietly as she could, she slowly slid off of the plastic seat of her desk. She kept a low stance, and crept towards the wall.

Her choice of stance, however, caused a problem. The zipper of her skirt was broken, and was slowly unfastening itself. With the way it was damaged, there was going to be no way to refasten it. A tiny zip noise caught her attention, as she glanced down to see the zipper had already come apart halfway.

A warmth of blush surged to Anna's face, and she put a hand over her mouth to cover her gasp. With a failing zipper and no panties, she could soon be completely bottomless. She quivered, and put a hand over the front of her skirt, again finding warmth as her heartbeat echoed in her mind.

The smallest touch of the skirt caused more problems for the failing zipper as it came more and more undone. Barely a quarter of the zipper was holding together. A gentle touch could completely separate the zipper and render it unable to stay on by itself. Anna would have to hold it together with her hand.

She gulped and glanced around the students immediately near her. The two closest ones that sat on opposite sides of her had their heads down, likely in a light nap. Others seemed to be whispering to each other, and even fewer were paying attention to the movie. For now, she was undiscovered.

Any further movements towards her panties could risk the complete failure of the zipper. If she got back to her seat, it would hold, and she could wait until class ended before taking any further risks with her clothing. It would be a long wait though, as class was only halfway done.

Then, there was a different idea. A nagging little thought in Anna's mind. To simply take a finger, and press through the zipper. Doing so would make the skirt unwearable without her hands holding it in place. She would be bottomless.

On purpose.