Imprisoned in my annoying classmate's room, not even allowed to pee... Nanazawa Mia MIDE-909

Mia, a school idol who was delivering something, was attacked, restrained, and imprisoned by a classmate who stayed home and didn't attend school. They forced her to drink a diuretic tea, making her urge to urinate to the point of exhaustion, and then prevented her from going to the toilet to film her incontinence… They then used this as leverage to further discipline her…