They spot her

Suddenly, they all stopped and stared straight at her, standing there stark bottomless. She heard a few titters of laughter, but the head girl raised her hand in a gesture of command, and they all stopped. The girl approached her slowly. Anna heard every click of her school uniform-compliant heels.

"Why, hello," the girl said to Anna. "What seems to be the problem?"

Anna hesitated, folding her hands with her arms down to cover her privates without looking too obvious.

"Oh, um, you see, my skirt zipper got stuck in the chair, and, um, it kind of ripped, haha," Anna explained.

“And your panties, too?” one of the girls asked wryly. Anna flushed with embarrassment.

"Let me see," the head girl said, crouching in front of the chair. She reached into the crevice and made a few little motions. Then, she pulled out Anna's stuck zipper. "Well, that was easy!" she said cheerfully as she straightened up, the skirt in her hand.

Anna stared in shock. How did she do that? She did not struggle at all! If this girl’s skirt had been snagged, she would have freed herself no problem, without all the desperation Anna got herself into. Though, let’s be real, Anna thought, this girl probably would have never gotten herself into this situation in the first place. She looked so perfectly in control.

"Thanks," Anna said, forcing a smile. She started pulling her skirt back on, but ended up awkwardly holding it shut at the rear.

“What’s the problem?” the girl asked.

“Oh, um, you see, my zipper broke, and I, um… I can’t get it to stay on.

“Oh, that’s terrible!” the girl said. Anna could not tell if she was mockingly exaggerating her concern. “What can we do about that?