There is always a person in your heart who has tried hard to love. He accompanies you through growth but you refuse to grow. His departure has become your greatest maturity. But when you look back when you are mature, that person is no longer there, and you are left alone to face "Monologue of the Past". The novel is divided into three volumes, from "Grug" when love is in my heart prematurely when I am young and ignorant, to "Blooming" when love matures as an adult, and finally "Failure" when the flowers bloom when they have to go their separate ways. Yi Hang, who was well-behaved when he was young, has lived alone since he was a child. He has become an independent-minded boy who advocates freedom and spontaneity. His life is very contradictory. He has his own ideas but is helpless in life. He is filial and polite, good at painting, knowledgeable and intelligent, but he is also a troubled boy who smokes, drinks, skips classes and gets into fights. His childhood friends, the playboy Chen Baisheng, and his academic cousin Su Da are best friends and are also troubled teenagers. He is a straight man who is good at making friends with the same sex. Compared with his rich circle of brothers, he has very few friends of the opposite sex, including Qin Mengke, a troubled girl and a scheming little lolita later on. When their first love was not yet fulfilled, love sprouted prematurely in their hearts. After experiencing several failed attempts prematurely, they still could not escape the unfinished ending. The story also inserts multiple emotional story lines from Cheng Baisheng, Su Da and others, reflecting the love views of different people in different periods. The plot of the story is a bit messy and redundant, but it is closely linked and has foreshadowing everywhere.