Niu Xiaole, a playful elementary school student, realized that most of his homework was unfinished just as the start of school approached. He rushed to finish it overnight with a friend, and the first day of school was full of mishaps and jokes. In the new semester, he gradually tempered himself through campus life such as interesting classes, group cooperation, and sports meeting preparations. Guided by teachers, accompanied by his good friend Wang Xiaohu, and helped by monitor Zhao Xiaoyu, Niu Xiaole slowly got rid of his procrastination and carelessness, settled down to adapt to the learning rhythm, steadily improved his grades, reaped sincere friendship, bid farewell to holiday laxity, and grew up steadily step by step.