A documentary-style project in which women endure the urge to urinate in front of four unmanned cameras. As the 12th installment of the Oni○ series, the rule is that participants already feel a strong need to pee at the start, yet must continue holding it until a timer goes off. Even after the first timer rings, they are forced to keep holding until a second timer sounds—an especially grueling setup unique to Oni○. Throughout the endurance period, the women share personal anecdotes about urination while desperately fighting the urge, pressing their hands against their crotches, squirming their legs and hips on camera. When the timer finally rings, there's a brief moment of relief—only to open a box and discover its contents, leaving them shocked and cursing, yet forced to resume holding once more. During urination, footage is edited with dual and triple camera angles, and each woman's released volume is measured. The swelling of their bladders and their uniquely expressive struggle poses are closely documented—offering an intense fetish experience. This main feature includes visible faces, and this project by Haisetsuya stands out as a compelling documentary capturing the raw tension between endurance and release.