Ouyang Yan was an orphan and grew up with his grandfather in a small alley in City C.
Xiao Jin is the most beloved son of his parents. When he was once again abandoned by his two sisters who were 13 years older than him, he unexpectedly met Ouyang Yu...
One is cold and rational, the other is naive and cheerful.
They had lived together for such a long time, from when they first met as children and held hands together in elementary school, to hooking up with each other in junior high school, and then riding bicycles to high school together... So long that they themselves thought in a daze that they would be together forever, their whole lives.
[I still remember that we were all very young back then, but now the sound of the piano is faint and I am waiting for you, you have never heard it]