The fourth installment of the extreme documentary-style series where women endure intense urinary urges in front of four unmanned cameras. Starting with already full bladders, the participants are forced to hold their urine until the timer sounds—and even then, a new timer immediately begins, requiring them to continue holding, a signature cruel twist of this series. Desperate and struggling, they share personal pee-related stories, press their hands between their legs, and squirm their hips and legs in agony. Relief upon hearing the timer is short-lived, as opening the box reveals a shocking new challenge, prompting curses and renewed endurance. During urination, dual-angle editing is used, and for those who make it in time, urine volume is measured along with bladder distension. This time, six women prone to accidents take part. Born from an email exchange with fan A-san and continuously evolving through viewer feedback, this series showcases uniquely intense and fetishistic expressions of desperate pee holding. Seven participants total. (Haietsuya) *Faces shown in main video*