Siblings
They were childhood sweethearts, they had different fathers and different mothers, but they could never be together.
Xu Mu said that Song Xixi was the Xixi of hope,
Song Xixi said that he was Mu under the sun.
They protect each other, love each other deeply, and follow each other.
When will you come back? I promise you a return date
If you don't want to come back, that's okay
I'm going to find you
Xu Mu will always love Song Xixi.