The library's quiet hum is shattered by the soft rustle of clothing and the hushed moans echoing from the bathroom. The librarian, her hair tied back in a severe bun, stands before the mirror, her reflection showing her unzipped skirt and her hand buried deep in her panties. Her fingers, slick with her own juices, stroke in and out of her wet cunt, her thumb rubbing her clit. She bites her lip, her eyes locked on her reflection, watching her body writhe with pleasure. The library's old walls seem to vibrate with her growing moans, her fingers moving faster, harder, her breath coming in short gasps. She's close, so close, when the library's door creaks open, and a familiar face appears, breaking her rhythm and leaving her teetering on the edge of ecstasy.