Koutaro Kudo was known as the "Streets' Strongest". Once, 13 thugs, thirsty for revenge, kidnapped his younger sister Hinami. Kotaro beat everyone, and on the... more>> 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... <<less