(W) Kafka Asagiri (A) Shiwasu Hoshikawa After learning that his long-lost sister, Gin, is in the Port Mafia headquarters, Akutagawa breaks free from his Agency colleagues and goes in alone-right through the front door! After four and a half years, it seems the two will finally be reunited, but?

(W) Kafka Asagiri (A) Shiwasu Hoshikawa, Sango Harukawa Young, hungry, and homeless, the orphan Atsushi Nakajima's hard knock life turns around when he meets Osamu Dazai, a peculiar man who's part of a group of detectives with special powers. And he wants Atsushi's help catching a man-eating tiger that's terrorizing Yokohama?! Experience the hit anime series adapted into a novel format!

(W) Kafka Asagiri (A/CA) Shiwasu Hoshikawa Not long after Ougai Mori takes the reins of the Port Mafia, he orders a young Osamu Dazai to investigate an ominous rumor of something called 'Arahabaki.' Whoever or whatever it is seems to have some connection to Mori's deceased predecessor-and the new boss would very much like for the dead to stay buried. Along the way, Dazai runs into a gravity manipulator named Chuuya Nakahara, leader of the Sheep gang of youths. Together, the two will one day achieve infamy as the fearsome duo known as Twin Dark, but for now, they'll have to learn to put aside their differences if they want to get to the bottom of this mystery??