Can't be found, gone forever as far as she's concerned.

After a minute or two of aimlessly looking around Anna gives up, it's not like she'll get caught like this...besides, her panties were just normal white panties, not like they could be linked to her...

As the lesson was drawing to it's end the only thing Anna could focus on was the cold plastic on her naked butt, in her frantic efforts to fix herself her skirt had hiked up more than she liked...soon enough though the bell for lesson end went off and her classmates started filing out, to avoid the risk of being caught she pretended to write some notes down as everyone left, when she was the last one she slowly stood up, pulling her skirt down to cover herself.

Then she remembered, the fastener was missing

"Well damn" she thought, hearing one or two very quiet *click* s...the zip links slowly coming undone.

She stood up and looked down at herself, her skirt looked fine, but what she felt was very different, she was playing a risky game now as she carefully but quickly walked out of the classroom, the breeze very noticeable.