Chapter 0: Introduction
In a world where Oni (demons) exist to steal an object that will unleash pure chaos, a crucial map to that object has been hidden for centuries.
To reach this map, six different maps indicating the locations of one another have been scattered across various places. To combat the Oni—who have taken the lives of countless innocent people with their demonic powers—a hero harnessed their power source and established the Raikō Agency. This agency wields that power through a sword designed to exterminate the Oni. For over a thousand years, their war has raged on, and by the year 1920, it shows no signs of ending.
In a quiet village near Tokyo, far removed from the front lines, lived a boy named Kazuno Sato. His life was simple—until the day everything changed.
