Long ago, a catastrophic Civil War ravaged Japan and led to its division into Kansai and Kanto. In Kansai, six proficient Akudama execute clandestine tasks assigned by a mysterious black cat, all while evading the authorities. But when an ordinary girl is dragged into their underworld and exposed to their unlawful deeds, the Akudama's criminal tendencies steer toward dangerous waters. It's worth noting that the director's cut of the final episode, released on May 28, 2021, includes about five minutes of extra material.