Lin Yi, who was young, had always protected Li Qianyang, who was easily injured. The fragile Li Qianyang and the gentle Li Qianyang run through Lin Yi's life. However, when he was twelve years old, Lin Yi left the town where he had lived for twelve years without even having time to say goodbye. Lin Yi, who left the small town, began to suffer from autism. Until she met Zuo Zuo, the guardian of Zuo Zuo allowed Lin Yi to step out of autism step by step. When Lin Yi had become accustomed to the life of being a guardian on the left, suddenly one day, a boy with handsome features appeared. He said, I am Li Qianyang. One side is childhood, the other side is youth,,,,,