All participants take on the challenge wearing yukata! Under the rule that they can finally pee when time is up, women endure their urges in front of unmanned cameras. Starting already with strong urges, each woman displays unique and individual ways of holding it in. After the first timer goes off, a second timer appears (+16 minutes), though they are not informed of its existence. The moment they open the box and discover the extension creates a thrilling, heart-pounding reaction. They continue enduring desperately, sharing personal stories about their urges, pressing their fingers against their crotches, wriggling their legs and hips, and struggling intensely. Relief upon the timer's sound is short-lived—opening the box brings shock and disbelief, yet they keep holding it in while cursing their fate. Those who endure receive a urine volume measurement, and bladder distension is also recorded. In this installment, four women end up leaking. [Kana] A sweet, gentle-looking beauty. She hikes her yukata up to her waist, exposing herself indecently while enduring, then gradually leaks as her face flushes with color. Seemingly aware of the camera, she lets out a shy "Fufufu" giggle, adorably embarrassed and bewildered as she stands in her own puddle. [Tomoko] A black-haired, child-faced office lady. She openly screams in a sexy robotic voice, begging desperately to pee—an unforgettable sight. The tight obi of her yukata presses against her bladder, causing her to moan "Ahh, haa, haa" breathlessly, revealing a sensual image of endurance. Her expression grows intensely agonized, almost orgasmic, as she presses her fingers against her urethra through her panties before finally breaking. [Saki] A mature, deep-voiced beauty, yet her methods of endurance are surprisingly crude—slapping her geta sandals with her heels, squirming her hips back and forth—revealing childish, contrasting gestures. She successfully holds it until the first timer, but then the time-extension trap activates! She struggles bravely for a while but ultimately reaches her limit while standing, and her earnest effort to clean up the mess afterward is both touching and endearing. [Risa] A slender beauty resembling Mizu○ Kishiko. She trembles uncontrollably while trying her best, but whispers seductively, "I can't do it," and gives in early. [Yoshino] A ditzy character and college student. She slaps her knees rapidly, exclaiming "My pee is coming down!" and bends each leg individually, showing off her quirky endurance style. Her reaction to the extension trap—"No way, seriously?!"—is perfect. She manages to hold on and ultimately releases a massive one liter in a powerful, satisfying stream. The main feature is recorded with full facial exposure.