One day, newly appointed teacher Kanata drinks a drink laced with a diuretic by a mischievous male student, and is unable to hold it in and ends up urinating. With her weakness exposed, Kanata is at the mercy of the student, who uses cunnilingus and fingering to make her squirt. The next day, Kanata is forced to drink the diuretic again, and she wets herself in the hallway during class while the students are studying in silence. The male student's mischief escalates even further, hiding under the podium and fingering Kanata. Having created a puddle in front of the other students, Kanata is forced to have creampie sex in front of the students in public...