Bungo Stray Dogs, Vol. 6 (light Novel)

What if the Port Mafia"™s Hellhound, Ryuunosuke Akutagawa, had joined the Armed Detective Agency? Likewise, what if Atsushi Nakajima belonged to the Port Mafia? In the parallel world of Bungo Stray Dogs: Beast, fledgling detective Akutagawa"™s desperate mission to rescue his younger sister from the Port Mafia"™s clutches brings him face-to-face with the organization"™s fearsome White Reaper. . a. k. Atsushi Nakajima. What does fate have in store for the two beasts in this alternate tale of darkness versus light. ?