Zhou Yumo was rescued by Liu Yucheng when he was a child, but he did not remember Liu Yucheng and gave his gemstone bracelet to Liu Yucheng.
They didn't meet again until Jiangning No. 1 Middle School, but Zhou Yumo never knew Liu Yucheng. Until Zhou Yumo had PTSD, Liu Yucheng was comforting him, and the exposed arm was his bracelet.
Two people recognize each other.
Purpose: Let everyone yearn for youth