This story follows two people through childhood and adolescence, bound together by their mothers' relationship. Their names sound like those of twins, so people often mistake them for siblings. Lin Junzhu is lively and energetic, while Gu Junyi is mature beyond his years. He is always her “top-student savior,” while she is the “unexpected delight” in his orderly life. After graduating from high school, Lin Junzhu barely gets into a nursing college, while Gu Junyi enters a top university. Where will their paths lead from here?