Decades past, a devastating Civil War tore through Japan, splitting the nation into two territories: Kansai and Kanto. In the Kansai region, a band of six Akudama undertake assignments from an enigmatic black cat, all while staying one step ahead of law enforcement. However, their perilous path takes an unexpected turn when an ordinary girl gets entangled in the Akudama’s world, exposing her to their illicit pursuits.