Overview
Set in an alternative world of Bungo Stray Dogs, this "what-if" story imagines if Atsushi Nakajima was in the Port Mafia and Ryūnosuke Akutagawa was in the Armed Detective Agency, instead of vice-versa. The story follows Ryūnosuke Akutagawa, who vows revenge on a man dressed in black in order to rescue his sister. However, as he is about to starve to death, a man from the Armed Detective Agency appears.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 28 | 31 | |
 | 30 | 34 | |
 | - | - | |
 | 44 | 47 | |
 | 22 | 26 | |
 | 32 | 36 | |
| - | - | |
 | 31 | 34 | |
| - | - | |
| - | - |