Gu Zeming is Lu Anan's neighbor and her best friend.
He is the person who grew up with her, and the person who secretly loves her.
The seat by the window of the classroom, the shadow on the way home from school, the name hidden in the scratch paper.
Those moments that no one knew were all his unspoken love.
Later he said: "I didn't like you suddenly, I liked you since I was a child."
Concept: pure sweet love, ambiguous love for each other without exposing each other