Song Qinghao transferred to Lan Shaohua's class in the second grade of junior high school and became Lan Shaohua's classmate, but because of their discord, they were always fighting. In the fourth grade, he transferred to another school for some reason. In the second year of high school, Qinghao came to Shaohua's class again as a sports student.
Concept: Young people's stories always appear in summer.