K: Memory of Red

K: Memory of Red is a manga prequel to the anime K. It is written by GoRA and illustrated by Yui Kuroe, and has been serialized in Kodansha's ARiA magazine from May 28, 2012 to July 28, 2013.

Summary
In Shizume City, everyone knows about the Red King. He is a King of otherworldly power, said to be the very personification of fire. No one truly believes in his existence, yet at the same time, they both fear and admire it.

The Red King is Mikoto Suoh, leader of the infamous Clan HOMRA. Anyone able to pass his Clan's "test" is able to join HOMRA. Nevertheless, their members are as close as blood kin. None of them is left alone. And none of them is harmed without their attackers being dealt with the same consequences.