Chapter 4
The spinoff follows Ryuunosuke 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.
Chapter 1
It's been roughly one year since Chya Nakahara joined the Port Mafia, and he's got his sights set on an executive position. But as he makes plans to move up, a man by the name of Paul Verlaineclaiming to be his older brotherappears and vows to assassinate everyone he cares about! Now, Chya must team up with Adam, a European A.I. investigator, to stop this lunatic before the storm swallows Yokohama once again