Once you've learned and committed a piece to memory, it's hard to forget not only in the mind but the heart as well.

Lee Jae-Sun(portrayed by actor Lee Jong Suk) is a pianist with a dream. He has been on his own since high school, his parents having kicked him out for hearing about their oldest son's preference in the same . He struggles day to day trying to make ends meet on this crazy roller coaster called life.  

Choi Do Jin(portrayed by actor Choi Daniel) is a arrogant rich boy with little care for the common folk. He's never worked a day in his life and expects anything he desires to be handed to him on a silver plater.

When two totally different people cross paths what could possibly happen?

Other Major Characters:

*Kwon Kicheol:Jae-Sun's best friend portrayed by actor Kim Woo-Bin

*Lee Ah-Young: Jae-Sun's mother portrayed by actress Yun Mi-Ra

*Lee Hyun Jun: Jae-Sun's father portrayed by actor Yun Ju-Sang

*Lee Hyun Woo: Jae-Sun's younger brother portrayed by actor Lee Hyun Woo

*Choi Kang-Hee: Choi Jung-Su's mother portrayed by actress Kim Mi-Sook

*Choi SeungHee: Choi Jung-Su's older sister portrayed by actress Do Ji Won

Minor Characters:

*Kye Min Sung: A friend of Hyun Woo's portrayed by actor Yo Seung Ho

*Choi So Hyung: SeungHee's daughter (one of twins) portrayed by actress Jin Ji Hee

*Choi Baek Hyung: SeungHee's son (one of twins) portrayed by actor Kang Han Byul

*Park DaeHyun: An aspiring artist portrayed by actor No Min Woo

*Lee Hana: A childhood friend of DoJin portrayed by actress Yoon Jin Yi