A late-night office. In the light of the desk lamp, a beat sounds with a keyboard rattle-rattle. Two people of section manager, Abe watching Office Lady, Yamamoto Miwako and her who drive a keyboard absorbedly. The atmosphere that grew tense. The Miwako finished work before long. And exchange a hot kiss in the place that was about to say something to Abe. Abe who I play with a body of the Miwako in an office of the darkness, and reaches the act. The Miwako which I feel while panting without showing even the behavior to hate. The company where the act that is such a non-Nichijou is held day after day. An event indecency is the beginning, and the story begins to change by this late-night unrest at a stretch….