15-Year-old Yao Han met 16-year-old Zhang Liangjie...
17-Year-old Yao Han confessed to 18-year-old Zhang Liangjie...
When 18-year-old Yao Han graduated, he broke up with 19-year-old Zhang Liangjie...
21-Year-old Yao Han and 22-year-old Zhang Liangjie met again...
"I will not give up"
"I believe you"
Concept: Adapted from people around me in high school