The story begins with Du Mingzhe moving into a shared house, and tells the story of how he, his roommate Zhao Yuhang, and his female classmate Lin Guoguo work hard in the modern city, deal with workplace and life problems, and experience emotional ups and downs, family tests, and friendship bonds. Each volume focuses on a different life theme: the first volume is about the beginning and adaptation of life, showing the various daily life in the city; the second volume goes deep into career and dreams, depicting the fluctuations of friendship and love; the third volume breaks through difficulties and realizes self-growth and belonging. The whole story has ups and downs, a tight rhythm, and embodies the philosophy of life in its humor. In the end, the three of them find their own direction of happiness in the city.