"Yu, promise me, we will be great pianists when we grow up. This is our agreement. Even if we become enemies, come and let's pull the strings!" "Okay, but after you become a pianist, you have to marry me!" "Okay."
Ling Yichun, known as the "Piano Elf", has had a childhood friend - Lan Xingyu since childhood. Because they both love piano, they have become fierce rivals! However, they did not forget their agreement! Xing, even if his appearance has changed, his heart will never forget it after so many years!