Causing her panties to slide down her legs.

(chapter originally by Misayaka on writing.com)

Unfortunately for the bound teacher, gravity wasn't on her side in the slightest, nor was her frantic movement helping matters any. Though Toriumi certainly halted her limbs' **** swaying motions when she felt the worst kind of draft imaginable. She definitely missed the presence of her clinging underwear when it wasn't containing her posterior's curves any longer. Instead she felt a telltale sensation of fabric around her lower thighs.

Her underwear was slipping off. "Oh crap, not here...!" With the mostly inaudible curse yelled to anyone who could hear, the pinned woman desperately tried to work her arms backward, no easy feat for a woman in her literal bind. It didn't matter, as long as she could pull the garment back up.

Toriumi had shown no small amount of athletic dexterity that evening, but this most recent attempt only resulted in...