Rabu, Asami, and Ayu, as new students, originally dreamed of an enjoyable school life. However, the existence of a certain school rule completely shattered that dream. It's a special educational program known as "Duty as the 'Convenience Store Girl'," an abnormal system that turns girls into living sex toys for male students. Forced into a humiliating situation far removed from the normal life they had hoped for, they are made to comply with coercive demands, enduring consecutive gang rapes with creampie after creampie. An extreme, twisted relationship unfolds, far beyond the boundaries of ordinary life.