The story takes place in a world where seven people with unusual powers are crowned as “kings,” and revolves around the “bonds” and “fate” between the people involved. (Source: Anime News Network)
The manga depicts what happens after the K: Missing Kings film from the viewpoints of different characters. (Source: Anime News Network)
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.
In the *K* novel series: V.1 - *Side: Blue* - Focuses on the history of the blue clan and the events which led to Munakata Reisi's appointment as the current blue king. (Takes place before the anime, but after the events of K Side: Red) V.2 - *Side: Red* - HOMRA in its early days and Anna's initiation to the clan. V.3 - *Side: Black & White* - The silver clan between episodes 7 and 8 of season 1, focusing on flashbacks to Kurou, Neko, and Shiro/Weissman’s past. V.4 - *R: B* - Suou Mikoto, leader of HOMRA, was strengthening his clan in Shizume Town. Munakata Reisi, the Blue King just enthroned, immediately reorganizes Scepter 4 and re-establishes order. When these two polar opposites meet, conflict is inevitable! V.5 - *Side: Green* - Features Gojou Sukuna as the main character, and follows his rise through the ranks of JUNGLE.

