During peak travel season, women's restrooms are always crowded with long lines, making it nearly impossible to hold it in. For women, the constant worry about finding a toilet diminishes the joy of going out. This work, the fourth installment in the series, doesn't simply promote wearing diapers as a convenient solution. Instead, it offers a fresh perspective focused on the actual "use of diapers" and the element of "humiliation." In this installment, every scene features only defecation, with all performers wearing transparent diapers. The women are filmed from multiple angles as they defecate while wearing the diapers. The video thoroughly captures their walking while heavily soiled, along with their personal reactions and comments. It also includes scenarios where the women have their diapers changed by others. The volume of feces reaches unprecedented, record-breaking levels, resulting in extremely intense and graphic footage. The video is packed with highlights: the squelching sounds of bowel movements, air escaping from an anus soaked in urine, massive amounts of feces threatening to burst through the transparent diaper, the sight of cloth wrappings absorbing both feces and urine, women sitting on clear chairs as they leak, and overflowing messes exceeding the diaper's capacity. For true enthusiasts, this is the ultimate excretion-filled experience shot from a highly specialized perspective. Enjoy this ultimate vision of excretion, comrades. (Haietsuya) ※ Faces fully shown in main feature