Every year at a certain girls' school, a "pinworm examination" is conducted. Hidden cameras secretly capture a mysterious toilet filming of young gyaru girls shamelessly exposing themselves during the check-up. Some press the film against their anus and sniff it with their nose, while others accidentally let out farts. Each girl has her own unique method of sample collection, unfolding in wildly different ways. Here, we reveal the embarrassing, never-before-seen private moments of these high school girls that they would never show anyone else! *Facial exposure in main feature.