Eiji moves to Tokyo to stay with his father, who is living alone due to work. When they meet at the workplace, Eiji is surprised to see his father well-groomed and appearing as a refined, mature man. Upon arriving at his father's place, Eiji is shocked when Maiko, a female coworker he saw earlier, suddenly appears from a back room. Realizing she is his father's mistress, Eiji finds himself irresistibly drawn to her sophisticated and alluring presence. As tensions rise, Eiji is forced to confront his complicated feelings toward his father and his own desires.