When you are young, you meet someone who will ruin your life.
The girl hides the secret love of her youth, and the boy hides the grief of the eternal death of his loved one.
To outsiders, substitute literature seems to be unethical, but they don't know that it is the key to the young man's recovery and release.
"Qu Ruochen, do you dare to say that you don't regard her as your sister's substitute?"
"Li Manman, I want to stand by your side, love you, and protect you."
"You are not my sister, nor are you my sister's substitute. You are the one I love."
Intention: The heartbeat when I was young, and I will deliver the answer when I grow up.