Misterioso 

Ji-Na, who has a mediocre talent, but is forced to play the violin as the only daughter of a big company. Gyeong-Mi, who had a genius talent, but was born as the daughter of a poor chauffeur and gave up on playing the piano. As Gyeong-Mi's father works as a driver for Ji-Na's family, the two meet and get closer through the link of music. Three years of puberty with music, they feel friendship and gradually love. (Source: Naver, translated) Note: Chapter count includes a two-chapter epilogue.