The story takes place in a small county town. The heroine Zuo Dai met and made some special friends, which made her realize the meaning of brothers and sisters, including her first love. She gradually gave up many things for these feelings. In the end, these feelings were like the collapse of a high building. After falling from heaven to hell, how should she start? Youth never ends, and the past must not be recalled. This is a story about the youth of a girl named Zuo Dai, and also the youth of a generation. I hope it can touch every reader.