Lin Zhi's diary holds a secret: it's about Shen Yu, the boy in the back row who is always falling asleep. She thought she was the only one caught up in this quiet turmoil. Then, just before graduation, she happened to open the sketchbook he'd left behind. Every page was filled with her. It turned out that throughout the silent drama of their youth, each of them had been the other's one and only lead.
