One day, while organizing books in the library, I noticed a familiar schoolgirl who often came to borrow books. She was standing across from me, always glancing over with a mischievous smile before turning her back. As I crouched down to sort the shelves, I caught a quick glimpse of her panties peeking out from under her skirt. I quickly looked away, flustered, but she noticed my reaction and smiled again, amused. The next time she faced me, her underwear became even more visible. Unable to resist, I found my eyes drawn to her panty flash, and she, noticing my gaze, laughed playfully. Seduced by her teasing, I finally lost all self-control.