Maid Mitsu lives and works in the household of a member of parliament. Her salary and living conditions are more than adequate, and she has faithfully carried out her duties. However, her only concern is the presence of the spoiled son, raised in a single-parent home. The young man's twisted desires soon fixate on Mitsu, and he gradually takes complete control over her, using her as he pleases. Transforming her into nothing more than a sex object, he repeatedly fills her body with his semen. As the process continues, Mitsu becomes increasingly submissive, obediently fulfilling every one of his demands.