The two were childhood sweethearts.
Just because Li Zhize secretly kissed Shi You while she was taking a nap and was discovered by Shi's parents. The two have since separated.
When we meet again, she is the female star Shi You who everyone admires, and he has become a doctor who saves lives and heals the wounded.
When she was a child, she pestered him, and now, he never leaves her.
Concept: The relationship between childhood sweethearts is constantly being cut apart