Nao Oonishi lives a dull and lonely life, neglected by her family. Her workaholic husband and son, obsessed with his club activities, barely pay her any attention. Seeking purpose, she takes on a part-time job as a housemaid. Her first assignment is cleaning the room of a black male employer. While tidying up, she accidentally discovers some adult videos he has purchased. Watching the scenes stirs intense arousal within her, and she gives in to temptation, masturbating. But then, she realizes her employer has noticed everything—his reaction will change her life forever.