Shiro and Kuroh are not the only ones who go to high school. Instead, the members of Homra (including their leader Suoh) and the members of Scepter 4 attend school together. The students are sometimes lax, but at other times, they are hot-headed.

(Source: ANN)

In modern Japan, where history has strangely overlapped with reality. There, seven "Kings" with great superpowers existed. Along with their clansman to whom they shared their own power with, the kings each formed clans. Order bound by blue, red flames that cause chaos, irregularities that shine in white, and reforms branched off into green. The Kings, each with their own abilities, now...

With "jungle" once again jumping back into action, the fates of the various Kings are brought together.

In Shizume city there's a legend about a red king with demon-like abilities that single-handendly created the Homra organization, as long as you get accepted into Homra, you can gain extraordinary powers.
(Source: AQUA Scans)

Tokyo Regional Legal Affairs Bureau Census Division, Annex 4 also known as SCEPTER 4 is a police institution that aims to stop criminals with special skills. But for them, their real target are...?

(source: AQUA Scans)

K: The First is the adaptation of the 2012 anime K Project. Set in a world where history has taken a slightly different course from the one we're familiar with, K follows the story of a young boy, Yashiro Isana, whose life is caught in a psychic war between seven kings. Yashiro is an easygoing teenager content with just being a student, until his seemingly perfect life is halted when a bloodthirsty clan, glowing in red with fire, attempts to kill him in the streets. Unbeknownst to Yashiro, he is suspected of murdering a member of their clan and will need a miracle to escape their vengeance. Miraculously, a young man named Kuroh Yatogami swings in and aids Yashiro in his getaway, only to reveal he's also after Yashiro's life. Now a hunted man, Yashiro will have to evade the clans of seven powerful kings and desperately try to prove his innocence, before it's too late!