Four unmanned cameras capture women desperately holding in their urine in this documentary-style project. The sixth installment of the "Oni○" series begins with the participants already experiencing significant bladder pressure, forced to endure until the timer sounds. Even after the first timer goes off, another timer appears (+16 minutes), requiring them to continue holding—this cruel twist is a signature trait of the Oni○ format. As they struggle, the women share personal pissing stories, pressing their fingers against their urethras, squirming their legs and hips in intense effort to suppress the urge. When the timer finally rings, there's a brief moment of relief—until they open the box and face a shocking twist. They continue enduring, cursing and suffering. The pissing scenes are edited from two angles, and for those who make it in time, urine volume is measured. Bladder distension is also recorded. This installment features four women who end up wetting themselves and three who reach their limit and release. Born from correspondence with Comrade A and continuously evolving based on viewer feedback, this series aims to deliver an intense fetish experience through the diverse, individualized expressions of urinary endurance. Seven participants. (Haietsuya) ※ Faces fully shown in main video.