The long-awaited special vehicle bursts onto the scene, pushing the boundaries of bondage and humiliation! A sealed private space equipped with a toilet installed on the truck bed completely restrains Yuki Maeda's arms and legs. Deployed as a temporary portable toilet at various locations—including in front of boys' schools, shopping districts, construction sites, office areas, and train stations—people continuously enter one after another. With the door locked, a completely airtight room is created! Amid sounds of people pounding on the door, unable to hold their urine, massive tits are groped and cunts are stimulated without restraint! Lesbian schoolgirls appear as well, escalating the humiliation into even more intense and depraved territory!