In an atmosphere of aristocracy and good manners, everything extravagant and in accordance with etiquette is highly respected, including classical music. The heroine is poorly informed about the works of legendary composers. She accidentally enters these high social circles because her mother remarried, this time to a magnate who placed her stepdaughter in an elite educational institution. She has to carefully hide the fact that she is just an ordinary commoner. The girl manages to win over her peers, and they even dream of being like her because she demonstrates high achievements and has refined behavior. But all of this is a facade and, moreover, she has her own goals for it.
She is thrown off course only by a chance encounter in the corridor with an incredible beauty. The girls around them are in awe because Lilisa Sudzunomiya, who hides her true nature, and Otoha Kurogane, the daughter of a famous politician, are seen as ideals. The heroine discovers a guitar mediator that the aristocratic Otoha dropped. But she didn't think that the lady played the guitar, so she didn't reveal herself when she desperately searched for the lost item. The truth will be revealed and it will be the beginning of their friendship.