Xu Han has a secret, that is Zhou Yi.
She has liked Zhou Yi since she was a child, but Zhou Yi has always regarded her as a younger sister.
In his senior year of high school, Xu Han originally wanted to tell Zhou Yi how he felt.
But I heard Zhou Yi calling.
"I don't like Xu Han. She is just my sister. Who wants to go to the same university as her? She has been sticking to me since she was a child. It's too late for me to be happy if she is not in the same school."
Later, Xu Han left the country without saying a word.
When they met again, their youthful feelings faded away.
Intention: I just want to be together forever