Minato (Taiga Kyomoto) belajar musik di luar negeri, tetapi ia kembali ke Jepang setelah mengalami trauma. Ia dipindahkan ke universitas musik bergengsi. Di sekolah musik tersebut, ia mendengar sebuah lagu indah yang dimainkan di piano dan menjadi terpesona oleh musiknya. Lagu tersebut membawanya bertemu dengan Yukino (Kotone Furukawa), yang sedang bermain piano. Minato menanyakan judul lagu yang dimainkan Yukino, tetapi Yukino mengatakan bahwa itu rahasia. Sejak saat itu, mereka menjadi dekat. Minato mampu menghadapi traumanya dengan piano. Suatu hari, Yukino tiba-tiba menghilang. Minato (Taiga Kyomoto) was studying music abroad, but he came back to Japan after experiencing trauma. He is transferred to a prestigious music university. At the music school, he hears a beautiful song played on the piano and becomes fascinated by the music. The song leads him to meet Yukino (Kotone Furukawa), who is playing the piano. He asks her for the name of the song she is playing, but she tells him that it is a secret. Since then, they have gotten close. Minato is able to face his trauma with the piano. One day, Yukino suddenly disappears.