Yan You

The delinquent Tong Yang was suspended after getting into a fight on the first day of school. Upon return, he was shunned by all his classmates. The top-scorer Xiao Zhen ran into Tong Yang hidden away crying by himself. Tong Yang tried to act tough, but his bluster only got him beat up instead. But for some reason, Xiao Zhen began to tutor Tong Yang after school, until Tong Yang found out that the boy who fought him that day was Xiao Zhen's little brother...

(Source: Kuaikan, translated)

Note: The series was originally self-published on Jing Jian’s Weibo blog. Currently releasing on Kuaikan Manhua and Bilibili Manhua since July 31, 2021.