Now an official member of the Agency after passing their entrance exam, Atsushi is assigned to his first case right away with Tanizaki and Naomi. Though deceptively simple on the surface, there's more than meets the eye...

Dazai has a face-off with his ex-partner, Chuuya, as Chuuya attempts to uncover Dazai's true intentions for letting himself get captured. Meanwhile, Atsuhi faces Akutagawa's intense and inexplicable hatred for him, as the ship continues on to the meeting place where he will be handed off in exchange for the bounty on his head...

The Port Mafia's council of five top executives has decreed that Mimic must be annihilated. In the ensuing battle, Odasaku has a fateful encounter with Gide, the leader of Mimic, who makes a cryptic prophecy. Night falls, and the usual bar now awaits Dazai, Odasaku and Ango...

John S. and Lovecraft hunt down Naomi and Haruno as they flee from town. While Atsushi and Dazai wait for them to arrive at the train station, Dazai notices a shady figure stalking him.

Atsushi and Akutagawa fail to call off the Moby Dick's descent. They search desperately for other ways to protect Yokohama.

Port Mafia leader Mori Ougai orders a fifteen-year-old Dazai Osamu to investigate the appearance of a certain individual in the Yokohama Settlement area.

Nakahara Chuuya and Dazai Osamu reveal the truth behind Arahabaki, Randou, the former Port Mafia boss and Chuuya himself.

The leaders of the Port Mafia and the Detective Agency are attacked by an assassin in a mask, leaving both of them ill.

The gifted responsible for the virus is on the run as Nakagawa Atsushi and Akutagawa Ryunosuke chase after him. Meanwhile, the Detective Agency has the Rats’ hideout surrounded to try to capture Fyodor Dostoevsky.

Security police officer Fukuzawa Yukichi arrives at work to discover that his client had been assassinated. The assassin is already apprehended by the time he arrives, but something doesn’t quite seem right.

Fukuzawa gives Rampo a pair of glasses, claiming that wearing them would activate his ability to instantly determine the truth of any situation, and taking them off would give him the ability to tolerate the stupidity of the ordinary person.

Teruko goes head-to-head with Sigma. Tachihara rethinks the Agency’s innocence after re-infiltrating the Port Mafia.