Murder Lock: School of the Killing is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading Murder Lock: School of the Killing chapters on VipToon.Net, fastest updating comic site. The Summary is
Kotaro Kudo was known as the "Streets' Strongest". Once, 13 thugs, thirsty for revenge, kidnapped his younger sister. Kotaro beat everyone, and on the same night, he was arrested on suspicion of murder, as each of them was later found dead. He is then forcefully enrolled to a certain school, in which all students must meet "a special criteria" to enter..