NHDTA-442 A female student who is so aroused that she can't help but masturbate on her bicycle seat, which has been smeared with an aphrodisiac, even on the way to school.

A hole is drilled in a female student's bicycle saddle and filled with a large amount of aphrodisiac. Unaware, the pranked female student endures riding her bicycle, but the aphrodisiac takes effect directly on her vagina, making it impossible to resist saddle masturbation. Unable to hold back any longer, she urinates in public. In her hazy consciousness, she is led into a blind spot and, in a state of compliance, goes wild with pleasure.