When I was a child, I accidentally got lost with my mother, and was picked up by my neighbor's brother Yan Chao, who brought Fengqiu home. The relationship between the two families became closer. Fengqiu would hold his brother's hand when he came home from school, and would often play at Yan Chao's house. Sometimes Yan Chao's mother would come back late from work, and Fengqiu's mother would ask Fengqiu to call her brother home. In Fengqiu's impression, he has always been a very good big brother, but in Yan Chao's heart, he thinks she is a lively and lovely sister. But since she entered high school, everything has changed. She became uncomfortable seeing her getting along with boys, and began to care about her and develop feelings for her.