Hao and Kai were childhood playmates. Because they went to the same school, they had always gone to school together. Although the clubs and grades were different, they had always interacted with each other and had a deep relationship with each other. However, since junior high school and elementary school were separated, everyone began to focus on each other's club activities and gradually stopped interacting with each other. Although Hao and Kai were childhood playmates, the gap between Hao and Kai for a few years actually made him very unfamiliar with Kai. He had excellent grades, was going well in basketball, and even got the opportunity to study overseas. However, Kai's life was not as smooth as he thought. He didn't know that Kai had been injured, and he didn't know that Kai had been depressed for a long time in the two years after he graduated, and then stopped showing his emotions. Hao also noticed that his relationship with Kai was not as good as before, but he did not say it out loud. Instead, he kept Kai by his side and maintained this relationship.