Naho is a third-year piano student at a music university, diligently working every day toward her dream of becoming a professional pianist. Her idol is Keiichi Ono, a renowned and popular pianist. Through a mutual friend—Shota, the son of Joubou Musical Instruments—the two finally meet. Introduced by Shota, Ono visits Naho's home and, claiming to enhance her lacking musical sensitivity, begins to manipulate her. Gradually, their relationship takes a dark and intimate turn.