When Trying to Get Back at the Hometown Bullies, Another Battle Began is a Manga/Manhwa/Manhua in english language, SUGGESTIVE series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Local bullies tormented Kotaro when he was a youngster. They were the skilled wrestler Akari. Kanae, a basketball prodigy, and Shigure, a prodigy in video games. Every day, Kotaro competed against these three guys in their respective sports with the intention of winning. Unfortunately, he was no match for them. As a senior in high school, Kotaro now has another opportunity to confront them and exact his retribution...! But he will discover a secret that he never would have expected....