Death Row Boy is a Manga/Manhwa/Manhua in english language, Action 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

Park Tae-Jun Comics Company, Kim Soong-Nyung / GwangsanShin Kim, the rare serial killer who shook the Republic of Korea! Ji-hoo, who lost his family to Kim Shin, meets another victim, Du-seok, and is trained as a human weapon. And he goes to prison on his own to kill the killer with his bare fists… ‘There has been no execution in our country since 1997. Shouldn’t someone be doing it?’