On the first day of transferring school, Bai Ranran bumped into the school sweetheart Xu Chun's secret in the library.
He was gently wiping a book of poems, and there was a tenderness in his eyes that she had never seen before.
Later she learned that the book belonged to Bai Yueguang, who died young.
Everyone said she was a stand-in, but Xu Cang held an umbrella for her for three years.
On graduation night, he drunkenly pressed her against the wall: "You were never a substitute..."
"That book of poems is filled with all the composition topics you wrote when you were sixteen."
