"Duty as the 'Convenience Store Girl'" refers to a special system established within a school. This is not an ordinary restroom, but rather a role assigned to a girl who becomes a restrained object of sexual domination—the so-called "benjo" (convenience girl). This "benjo" serves as a shared pussy for all male students, existing solely to satisfy their sexual desires. It's a deeply disturbing norm where every student has access to her body and can forcibly impose sexual acts at will. Bareback sex, creampie ejaculations, and repeated consecutive penetrations occur routinely, creating a perverse cycle where each act delivers new sensations in this twisted system. Male students use the "Duty as the Convenience Girl" as an outlet for their lust, penetrating her countless times without any consequences, trapped in an extremely unrealistic and degrading reality.