Hidden in Summer Fog

I know that even a tree full of flowers will one day wither away. But I didn't expect that day to come so quickly and suddenly, When I was unprepared, Overnight, all the flowers fell, The joy I once felt because of the blooming flowers no longer exists. The flowers in my heart will never bloom again. Five years ago in the summer, Shen Mingtong, who had just graduated from high school, passed away unexpectedly; Five years later, Shen Zhiqiao, who followed his brother's path to Beihuai Middle School, will encounter something here; Jiang Muchuan, who can't see clearly and can't guess; Li Nanqin and Xu Zijing are naturally stupid; Xiang Yuwei has always been by her side. Some things will not simply be summarized as the past with the passage of time. Those questions that you can't figure out clearly, Can you find the answer here?