When Hyeon-Seo (Keum Sae-Rok) and Su-Ho (Noh Sang-Hyun) were university students, they met while playing for a music band as the vocalist and keyboardist and fell in love. For years, they spent most of their time together. After graduating, they experienced pressure from real life and went through difficult times. This led to them breaking up. Years later, Hyeon-Seo has given up on her dream and she now works as a piano tutor. Su-Ho is a successful and rich CEO, but he is also burnt out. They happen to meet again.