Wishing to compose a song for her idol, Hayato, to sing someday, Haruka enrolls into Saotome Academy. Prior to her enrollment, Haruka has no experience in reading sheet music despite being able to play the piano (it was taught to her by her grandmother). As the story progresses, she shows that she has talent in composing songs. Because of her caring personality, she has the ability to move people's hearts. Haruka was a sickly child and moved in with her grandmother in the country while she was young because the city made her "dizzy".