What exactly is Chūya Nakahara-? The story of Twin Dark's "Sixteen" shall now unfold. It has been a year since Chūya joined the Port Mafia after ending the "Arahabaki Incident" with Osamu Dazai. As he aims for the executive position, a man named Paul Verlaine appears before Chūya, calling him his younger brother! "I will kill anyone who intervenes with your heart," he announces. To thwart his plans, Chūya teams up with European artificial intelligence investigator, Adam. The sign of a storm waiting to swallow Yokohama brews once again. What exactly is Chūya Nakahara: the truth of the past shrouded in darkness shall now be revealed-! (Warning: This is not the Original Translation and it's only a Summary of all chapters)

Ten years before the events of the manga series, a fateful encounter brings a professional bodyguard named Yukichi Fukuzawa and an arrogant boy genius named Ranpo Edogawa together. The result: the establishment of the Armed Detective Agency, an organization that takes on dangerous jobs even the police won't handle! P.S - This belongs to Kafka Asagiri not mine

The Armed Detective Agency's latest case brings them to a strange island off the coast of Yokohama called "Standard Island," but what awaits them turns out to be far more complicated than expected: a bomb, time travel, a mysterious skill user named H.G. Wells... Will this incident spell the end of Yokohama itself? P.S. This Belongs to Kafka Asagiri not mine