Ling Ziming and Cheng Yi are good friends who grew up together. They come from two incomplete families. Ling Ziming lived with his second aunt, while Cheng Yi was raised by his grandmother. Because of this, the two boys supported each other emotionally and grew up together. The two people who entered puberty gradually changed psychologically. As young boys, they did not understand what "love" was. They tested each other again and again, but gradually drifted away...