A love story revolving around childhood sweethearts, Ling Chao and Xiao Tu, who journey through youth and share experiences in sadness and joy together. Since he was a child, Ling Chao always knew that his mother preferred daughters. Coincidentally, their neighbor's family has a daughter, Xiao Tu, who is the same age as him. Ling Chao eventually became her god-brother. His only friend is Xiao Tu, and only Xiao Tu is in his heart. When he grows up, he understands that he can't do anything without Xiao Tu, because he has unexpectedly fallen in love with her, but he has never admitted it.
