On the first day of starting at Yunshui Town Middle School, Ye Linchuan is knocked flat by Zhu Bingjie, who crashes into him while showing off on her bike, her brakes having failed. To their surprise, the two, whose personalities are complete opposites, are assigned to the same class and become deskmates, spending every day together. The boy is brash and mischievous, always playing pranks to catch the cool, distant girl's attention. She is quiet and reserved, hiding countless feelings deep in her eyes.
Long-buried family secrets slowly come to light, and reality stands between the two teenagers. As they part, Ye Linchuan asks her earnestly, "When we grow up, will you marry me?"
Zhu Bingjie's cheeks flush red, and she silently nods.
A promise made in youth ties them together for years to come.
