Fiend's Song

Gedou no Uta
外道の歌

Prequel

manga

The manga centers on Kamo and his partner Tora, who work in the underworld as "avengers for hire," taking on jobs from the victims of violent crimes and families seeking vengeance for wrongs done to them.

Spin-off

manga

A spin-off series set 6 years before the events of Zenaku no Kuzu focused on Yumeji Sonoda's college days.

Spin-off

manga

Kayoko Enoki leads the Tokyo branch of "The Breakfast Club," an organization that aids victims seeking revenge in a way different from Kamo and Tora. Abducted and sexually assaulted at the age of eight, what drove her to join this mysterious group? Source: emaqi