Youth is a very big word, I just use them to interpret this word.
The first part of the story tells about Ling Luqi's family - when she was a child, her mother eloped with her wealthy uncle, when she was an adolescent, her father was jailed for drug trafficking, and was eventually shot. She met a young man named Ji Zhongxuan, and her good friend Xie Xuan fell in love with him. She regressed, was sad, and sad, but they were still inseparable from each other.
The second part is about Xie Xuan. She is an unforgivable woman. There is something hateful about poor people, and there is also something pitiable about hateful people. She indirectly killed her good friend Li Wenwen. The three people who were particularly close to her, Ling Luqi, Li Wenwen, and Xie Xuan, were instantly torn apart. Later, she met Xia Yingxi. He left for various reasons. She has been waiting for five years. In the days to come, I don't know how long she will have to wait.
The third part is about Ji Zhongyan. She is Ji Zhongxuan's sister. She fell in love with her brother's good friend Lin Yuekai. The person Lin Yuekai loved was Li Wenwen. In the end, Li Wenwen died, and Lin Yuekai realized that he should end it all for many years. Later, Ji Zhongyan saw Lin Yuekai at her sister Ji Zhongxi's wedding. There was an innocent girl beside him. His happiness was ordinary. He learned to keep to himself and use the ground as a prison. Ji Zhongyan really grew up.