Genres: Music, Romance, Youth, Drama

Lee Sin is a university student majoring in modern music. He is the vocalist of the band "The Stupid" and also plays the guitar. He is known for his good looks and his strong passion for music but is, in reality, a cold person who is uninterested in non-music-related things and has no dreams or plans for the future. Sin initially likes a dance professor at his university, but this all changes when he meets Lee Gyu Won.

Lee Gyu Won is a bright and outgoing student who was born into a prestigious family and is majoring in traditional Korean instruments, especially the gayageum. Gyu Won's grandfather, Lee Dong Gun, is one of the top 3 traditional musicians of his age, and his biggest wish is to have his granddaughter trained to become a traditional music prodigy in 10 years' time. Trying to live up to her grandfather's expectations, Gyu Won immerses herself in training and becomes a university student who knows nothing besides traditional music. As Gyu Won's friends are fans of "The Stupid", she was forced to go to the band's concert with them. There, she sees Lee Sin performing live and is immediately captivated by him.

Tags: Love Triangle, Grandpa-Granddaughter Relationship, Band, Competition, University, Enemies To Lovers, Female Chases Male First, Neighbors' Relationship, Student Supporting Character, Student Female Lead