Asuka is a married woman who works as an office cleaner. Her husband doesn't pay her any attention, so she feels the secret gaze of a young employee, Matsuda. Matsuda approaches her and caresses her in the office late at night, and although she resists, her body, filled with desire, responds and she becomes immersed in an affair with him. The two of them run wild with desire, and they have lewd rendezvous in the office at night.