The first time He Jingnan met Cheng Yi was at his parents' funeral.
Cheng Yi's parents held Cheng Yi's hand, their eyes red and their eyebrows arched.
"Xiao Yi, call me brother."
The nine-year-old child looked up at him timidly, but still spoke.
"Brother."
Since then, He Jingnan's life has undergone earth-shaking changes.
The little sun is sticky in the lower year and gentle and lively in the upper year.
Concept: Growth is a pain like pulling out muscles and bones