K (also called K Project) is a Japanese anime series created by the animation studio GoHands and GoRA, a group consisting of seven anonymous authors known as Kōhei Azano, Tatsuki Miyazawa, Yukako Kabei, Yashichiro Takahashi, Hideyuki Furuhashi, Suzu Suzuki, and Rei Rairaku.

Yashiro Isana, a seemingly normal student of Ashinaka High School, is targeted by HOMRA of the Red Clan and Scepter 4 of the Blue Clan, following the murder of pacifist Tatara Totsuka from HOMRA.

A manga prequel called K: Memory of Red, drawn by Yui Kuroe was serialized in Kodansha's Aria between May 28, 2012 and August 15, 2013.

A third manga K: Days of Blue, was serialized in Kodansha's Aria between November 2013 and July 2014, and a fourth, K: Countdown, ran in Aria from December 2014 to July 2015, while a fifth, K: Missing Kings, ran in Monthly GFantasy from April to August 2015.

Five more manga series; K: The First, Gakuen K, K: Lost small world, K: Dream of Green, and K: Return of Kings, are also still ongoing.

However, nothing normal has been happening since the recent murder of Tatara Totsuka, prominent member of the infamous HOMRA.

The anime has been licensed by Viz Media in North America[8] and by Madman Entertainment in Australia.

Insert songs include "Circle of Friends" by Yūki Kaji and "Itsuka no Zero Kara" (いつかのゼロから) by Angela.

[12] It was announced that there will be a six-part film series, titled "K: Seven Stories"[14] and was released between July 7, 2018 and December 1, 2018.