Danganronpa Gaiden: Killer Killer

Danganronpa Gaiden: Killer Killer (ダンガンロンパ 害伝キラーキラー Danganronpa Gaiden Kirā Kirā) is a manga spin off of Danganronpa 3: The End of Hope's Peak Academy.

The manga was released on March 8, 2016 in Bessatsu Shōnen Magazine April issue. The original concept was made by Spike Chunsoft and the scenario was created by both Kazutaka Kodaka and Kōichirō Koizumi.

Synopsis
In response to The Biggest, Most Awful, Most Tragic Event in Human History, an organization called Future Foundation was created to combat the chaos still present even after the death of The Mastermind.

Misaki Asano is a new recruit, working as a special investigator for the 6th Division's Special Case Bureau--a branch dedicated to only the most bizarre and challenging murder cases. Alongside her partner, Takumi Hijirihara, they aim to combat despair one case at a time.

Though, perhaps their most challenging case is that of the mysterious Killer Killer, a bizarre serial killer who chooses to target other murderers.

Chapter 1

 * Misaki Asano (Main)
 * Takumi Hijirihara (Main)
 * Ikue Dogami (Main)
 * Momomichi Ito (Minor)

Chapter 2

 * Mekuru Katsuragi (Main)
 * Rei Shimizu (Minor)

Chapter 3

 * Ted Chikatilo (Main)
 * Eiichirou Saiyama (Minor)
 * Makoto Naegi

Trivia

 * The deaths of Sayaka Maizono, Mukuro Ikusaba, and Chihiro Fujisaki are referenced in Chapter 3 as various people are shown murdered in similiar poses.