In the Mosaic Department, a unique division within adult video production responsible for applying mosaics to penises and vaginas, important work is carried out. This setting, where housewives are hired as part-time workers, creates a surreal environment distinct from everyday life. Now, a cute and innocent married woman has joined the Mosaic Department as a new employee. Since she's unfamiliar with the adult video industry, a culture of sexual harassment by staff members begins to emerge, deemed "acceptable" due to her naivety. Worse, some staff members secretly film inside the department while initiating lewd acts, hoping to have sex with her. The situation takes a shocking turn when they conduct hands-on training for her mosaic duties—forcing her to view a real, erect penis up close. Overwhelmed by excitement at the sight, the married woman can no longer restrain herself...!