Description：During the millennium, the story takes place in a high school located in the center of Chongqing. In the fresh and simple campus and under the high-rise buildings around it, two completely different youthful atmospheres meet here. They go from being opposed to each other to merging with each other, and experience together a passionate, silly and warm story of youth. Here is not only the first cry of the teenagers facing the adult world, but also a warm journey of mutual support and common growth. Along the way, several teenagers with different backgrounds and personalities will face the conflict between the innocent campus and the social reality, run towards the sun in the interweaving of family affection, friendship, and ignorant love, cool as the wind and wild as a dog, and thus find a sky that belongs to them.