Souma Kurumi struggles with her nymphomaniac mother, Mitsuko, whose blatant promiscuity permeates their home. Simultaneously, a new employee named Mesu Naoko joins a company where the manager, Souko, provides "professional training" that consists of sexual favors for male coworkers. Naoko quickly adapts to this unconventional workplace culture, viewing her sexual encounters as a way to excel in her new career.