It tells the heart-warming story of the cute little dumpling Jiang Zhizhi and her aloof brother Shen Yan from kindergarten to adulthood. Jiang Zhizhi is lively and cute, while Shen Yan looks cold but is extremely soft-hearted towards her. The two little people went from being "picked-up little brothers" to each other's most trustworthy support. They accompanied each other on the road of growth, made a promise to become childhood sweethearts, and were sweet and healing.