Lin Youwei wrote six letters to Chen Shu in her life, but she was unable to send any of them. When she was dying, she went back to the past and returned to every moment she wanted to send the letter after writing it.
In the past, she had seen a different Chen Shu. In her previous opinion, Chen Shu was gentle, polite, good-tempered, and patient with others. But by chance, she ran into his secret and saw another side of Chen Shu that no one had ever seen. He was sinister, vengeful, unkind, cold and melancholy, and kept away from strangers. But even so, Lin Youyou found that she still liked him, and even this time, she wanted to protect him.
Purpose: Regain hope