Nao, a housewife, takes a part-time job as a cleaner after her husband's income decreases. However, she is raped by the company president at her workplace and, under threat, is forced to work as an office clerk. Her days in the office are spent constantly evading the president's watchful eye. He begins to train and dominate her, gradually tightening his control. Keeping it a secret from her husband, her situation worsens. Eventually, she is used as the president's secretary and forced to provide sexual hospitality for business clients. Over time, Nao begins to seek pleasure on her own, and ultimately starts willingly embracing this path.