About a year after joining the Port Mafia, Chuuya Nakahara is angling for an executive seat when a man calling himself Paul Verlaine turns up claiming to be his brother and swearing to kill everyone Chuuya cares about. To stop him before Yokohama pays the price, Chuuya partners with Adam Frankenstein, a European investigator built around an artificial intelligence. Set years before Dazai leaves the Port Mafia for the Armed Detective Agency, this ongoing manga adapts the Stormbringer light novel.