Juvenile Prison 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

'Cha Ju-young' is imprisoned in a juvenile detention center for rendering his gangster father comatose. Not long after, the father, who was thought never to wake up, comes to visit...