New teacher Kanata accidentally drinks a diuretic-laced beverage set up by a mischievous male student, leading to an uncontrollable urge to urinate. With her weakness exposed, Kanata is forced to comply with the student's demands, squirting uncontrollably during intense pussy and handjob play. The next day, Kanata is tricked into drinking the diuretic again, resulting in a massive bladder leak in the hallway while students are studying quietly. The student's pranks escalate further as he hides under the teacher's desk and gives her a handjob. Caught in the act and creating a puddle in front of her students, Kanata is publicly humiliated and forced to endure a creampie session right there in the classroom...