Tsubasa starts working the night cleaning shift at a nearby cafe to distance herself from her emotionally abusive husband. After closing time, the quiet store filled with the aroma of coffee becomes a sanctuary for Tsubasa, who loves reading. However, the peaceful atmosphere stirs up old memories, and she begins to feel an uncontrollable arousal. As she struggles to cope with the growing desire, she starts to relieve herself alone in the store's restroom. One day, the master, Kita, who shares her love for reading, catches her in the act, and the story takes a new turn.