Genre: Drama, Romance, Music
Based on the internet novel of the same title and written by Guiyeoni, Do Re Mi Fa So La Ti Do is a touching love story with bittersweet elements. Jung Won (Cha Ye Ryeon) works at an amusement park as a dragon mascot. She pours soda over Eun Gyu (Jang Geun Suk) who made fun of her. Later, she finds out that Eun Gyu has moved into the house next to hers. Eun Gyu now threatens to tell Jung Won’s parents that she works part time at the amusement park. To keep Eun Gyu quiet, Jung Won agrees to carry his guitar for a week. Jung Won then starts developings feelings for Eun Gyu, who is the lead singer in a band called Do Re Mi Fa So La Ti Do. Eun Gyu also starts to develop similar feelings for Jung Won. The two soon become a couple.
With an odd twist of fate, Jung-won goes to the bands rehearsal room and meets a familiar person from her past, a boy named Hee Won (Jeong Ui Cheol). Their relationship makes everything make more complicated. 10 years ago, Jung Won and Hee Won were close friends, but because of a personal matter stopped talking to each other completely. Jung Won is now surprised to learn that her ex-close friend is now best friends with her boyfriend.
Hee Won admits that he still likes his bestfriend and he wants her back. Now Jung Won is torn between her friendship with Hee Won and her love Eun Gyu.