Spin-off series about the everyday life of the members of the Armed Detective Agency and the Port Mafia.

The story begins with an attack on humanity by giant indestructible monsters named "Enemies". The Enemies drive humanity to the brink of extinction... but the... more>> one to save the world from the depths of hell is a lone boy! <<less

The manga is based on the spinoff light novel of the same title and explores the past of the characters Osamu Dazai and Chuuya Nakahara.

Siblings Ayane and Kurumi have unique supernatural powers known as Ghosts, each with their own unique rating that designates their powers. Ayane has a score... more>> of 7, while Kurumi has a score of 11. Ayane's ability allows her to control shoe laces, while Kurumi can form contracts with objects, which allow her to control them. Ayane feels severely inferior to her sister, but will she be able to prove herself against the other Ghost-bearers in combat? <<less