A timid Japanese schoolgirl, barely out of her teens, finds herself at the mercy of her perverse teacher. In a cramped, traditional bathroom, she's dosed with a potent mix of diuretic and aphrodisiac. Her eyes widen in shock as her bladder swells, her cute uniform growing damp with urgency. Trapped, she can only watch as her teacher's gaze caresses her developing curves. When she can hold it no longer, a torrent of warm relief gushes forth, soaking her stockings and shoes. But the teacher's not done yet, pushing her to the edge of ecstasy with expert fingers, her tight little body convulsing with orgasm after orgasm.