A cute and straight-A student who is active in club activities is forced to drink a beverage laced with an overly powerful diuretic by a mischievous student. Naturally, she can't hold it in any longer and manages to reach the toilet, but it's unexpectedly being cleaned… With no other choice, she relieves herself nearby, and at that moment, she is attacked. On top of that, she goes into panic from the mix of pleasure and shame from the humiliating cunnilingus…
