Nao, a Junior High student, has developed an intense brother complex that borders on incestuous. She is resolute in her efforts to make her older brother, High School student Shuusuke, view her as a woman. In her zealousness, she enters his room and disposes of all his non-incestuous pornography. However, during her search, she discovers a photo album without a single childhood picture of herself. This unexpected revelation raises many questions.