The novel tells the story of Pei Shangxuan and Li Li, who went from quarreling with each other to caring about each other in high school, but they missed each other because they never expressed their feelings. There is a scar on Li Li's palm, which cuts off the line of career, life and love. This is the scar Pei Shangxuan left on her, which will never be erased. After fifteen years, Pei Shangxuan finally fell in love with Li Li, but her love for him could no longer continue. It turns out that love is not a migratory bird, it has no return date.
The last youth is the perfect ending