Due to his father's job transfer, Kousuke, who had to live alone in the apartment where he used to live with his family, made his heart flutter with Toukai, the married woman across the street who had been acquainted with his family for a long time. One day, Kousuke was invited by Kani to come and have tea. Kousuke was nervous being alone with his admired married woman, but Touka changed clothes and headed to the bedroom. Then, through the gap between the sliding doors in the bedroom, Touka's underwear appears... Seeing that, Kousuke can't control his feelings...
