Four unmanned cameras are set up for this documentary-style project, observing women desperately holding in their urine. As the 11th installment of the Oni○ series, the challenge begins with participants already feeling strong urges, forced to endure until a timer sounds. Even after the initial alarm, an additional 16-minute timer is activated, a signature Oni○ twist that pushes their limits further. Throughout the endurance period, the women share personal stories about urination while frantically clenching with their fingers, squirming their legs and hips in a desperate struggle. When the timer finally rings, brief relief turns to shock upon opening a box revealing an unexpected outcome—prompting curses and continued suffering. Pissing scenes are edited in dual and triple angles, and those who endure are measured for urine volume. Bladder distension is also recorded. In this installment, five women ended up wetting themselves, with two reaching their limit and fully releasing. The main footage features full facial exposure. (Haietsuya)