Around her knees.

As she and another student carried a largely awkward but not overly heavy stand for an anatomy skeleton up the stairs Alex was unaware of the fact one of the platforn legs was pulling the side of her skirt up.

The back was now functionally irrelevant to anyone walking behind her and anyone looking from her rightside could see enough of and through her lacy satin thong to know the girl was shaved down to a thin racing stripe.

As they arrived on the floor Alex was surprised to see the number of students just milling about in the hallway having apprently completed the move faster than her class. Most were engrossed in their phones but the few who noticed the show she was putting on soon nudged their buddies into attentiveness.

When they arrived at the new homeroom the T.A. in charge of setting things up sent them back downstairs as they somehow already had a stand in the new room.

As they went to awkwardly turn around in the narrow hallway alex was pushed against a high backed chair waiting to be placed in a classroom. the stand continued coming for a few more inches pushing her skirt still higher up as well dislodging the sidetie on her parties (with a couple delicate tugs of an impish nature.). The feeling of her panties going slack and sliding to her knees was lost in the rustle of fabric as Alex's attention was focused on not bumping into anything with the stand.

The other students in the hall were not as oblivious atleast a dozen cellphone cameras semi-decretely captured the fuctionally bottomless young beauty's image as she walked by with her panties at half mast.

The few teachers who noticed the scene merely shook their heads. Reporting what they had seen but taking no action the Vice Principle had been very clear in the staff announcement group chat/email progran.

Alex's warbrobe malfuction had already been addressed in full, they were to allow her the freedom to choose this lack of modesty. and to make an example of her in just how embarrassing stunts like this end up being. To curb copy cat behavior.

Mr.Tomlin the American history teacher shook his head as he watched the teens bottom bounce around the corner heading downstairs. She didn't seem all that embarrassed to him...