Bungo Stray Dogs, Vol. 6 (light novel)

What if the Port Mafia's attack dog, Ryuunosuke Akutagawa, had joined theArmed Detective Agency? Likewise, what if Atsushi Nakajima belonged to the PortMafia? In the parallel universe of Bungo Stray Dogs: Beast, Akutagawa'sdesperate mission to rescue his younger sister from the Port Mafia's clutchesbrings him face-to-face with the organization's fearsome White Reaper...akaAtsushi Nakajima. What does fate have in store for this alternate tale ofdarkness versus light...?