Women take on the challenge of enduring the urge to urinate while locked in chastity belts. The lock uses a combination dial, and they must guess the correct three-digit code to unlock it, relying on hints given periodically. However, all the hints provided are lies. Unaware of this fact, the women keep muttering "It won't open, it won't open," repeatedly entering incorrect numbers. Their struggle is intense—sometimes standing with legs wide apart, squirming and trembling—but they desperately hold on. Even after starting to leak, they tense their entire bodies, fighting with all their strength until exhaustion. Five women end up urinating. [Shiori] squirms cutely throughout, showing brief flashes of charm while struggling desperately. Even after leaking, she continues fighting until completely drained. [Karina], a beautiful mature woman, grits her teeth and battles like a warrior. With the lock still unopened, her bloated belly shakes as she writhes in realism—her released urine gushing strongly forward. [Rin], the masked beauty, suddenly whispers, "I've leaked..." She braces herself briefly, but soon collapses into a squat as the steady "drip, drip" sound hits the floor. [Mari], the prim and proper type, remains restless and fidgety throughout, too overwhelmed to even attempt unlocking. Her ladylike accident results in multiple thin streams falling like a bamboo blind. [Miki], the sweet-faced, gentle-looking girl, suddenly freezes completely—then in an instant, "JAAAA~~~!!!"—the sound of excretion erupts as she reaches her absolute limit. ※Face visible in main feature