BEAST narrates an alternate universe, with Ryunosuke Akutagawa joining the Armed Detective Agency, and Atsushi Nakajima acting as a subordinate in the Port Mafia. Under the mentorship of Sakunosuke Oda, Akutagawa strives to confront the Port Mafia's Boss, Dazai Osamu, and free Gin, his younger sister, from the Port Mafia. The mission leads him to an intense feud with the Port Mafia's "White Reaper", Atsushi Nakajima.
This is a book of oneshots which are character x chracter, I wont do any x readers sorry! I'm still fairly new to this app so please bare with me. This book will contain mild spoilers for seasons 1-3 of Bungo Stray Dogs as well as spoilers from the movie and some of the manga so I suggest watching/reading it all before reading these oneshots