It tells the story of their childhood and adolescence, which were bound by their mother's relationship. The names are like twins and are often misunderstood. Lin Junzhu is lively and active, while Gu Junyi is young and mature. He will always be her "savior", and she will be his "unexpected surprise" in his regular life. After graduating from high school, Lin Junzhu barely managed to enroll in a nursing college, while Gu Junyi entered a top prestigious school. Where will they go in the end?