When he was in junior high school, something unexpected happened at the home of Yan Xingluo's best friend, Lu Zechuan.
"I promise you I'll come back when it's full."
"You broke the appointment"
"I'm sorry"
"It's okay, just pledge yourself to me!"
Purpose: The full text revolves around the growth of the teenagers, and tells how they encountered many setbacks along the way. People they loved were separated, and things they had were lost. But they persisted in their pursuit and love, and eventually became better versions of themselves.