King of Violence is a Manga/Manhwa/Manhua in english language, Fight 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

Lee Gilsoo moved schools in order to avoid the hell-like organizational bullying. At the new school, there are no bullies or bullying, but there is school violence?! A world of fair violence among students, the “Fighting Arena.” Within the Fighting Arena, students fight and enjoy violence. Can Lee Gilsoo, who has only ever lived getting beaten up, adjust to this fierce world of violence? This is the bloody school action growth story of the loner bully victim, Lee Gilsoo!