Chen Xi, a Gemini high school student, has a two-sided personality. On one side, she is silly and cute in front of acquaintances, and on the other side, she is rational and depressed. She is cold and enthusiastic, sensitive and slow. In her last year of high school, she and her friends Lu Xiao and Wu Yi met Xiao Yang, Shi Ruihao and others, and tasted the bitterness and sweetness of life for the first time. This book tells the story of how they had to face various confusions from family, school, and relationships during this year. They acted alone but accompanied each other, and finally grew up separately.