In the parallel universe of Bungo Stray Dogs: Beast, Ryuunosuke Akutagawa‚Äôs desperate mission to save his younger sister leads to him being recruited by the armed detective agency! But standing in his way is none other than the fearsome White Reaper of the Port Mafia‚ ÄîAtsushi Nakajima. As darkness and light face off, what fate awaits the two...?