Dazai and Chuuya face Randou in a climactic showdown. Their opponent wields the former boss of the Mafia through his powerful skill, putting the two on the defensive. A decisive blow is struck, the past is revealed, and the Arahabaki incident draws to a close, but...when the dust settles, to what end will the boys’ decisions lead them? Find out in the final volume of this thrilling prequel to Bungo Stray Dogs!