Welcome to the gritty underworld of Yokohama, where the line between justice and chaos is thinner than a razor blade. Before they became the legendary duo known for keeping the city's supernatural threats at bay, Doppo Kunikida and Osamu Dazai were nothing more than a disaster waiting to happen. Kunikida is a man who lives by the book, a meticulous detective whose every breath is planned out in his cherished notebook. But his orderly world is about to be turned upside down when he is forced to partner with the Armed Detective Agency’s newest recruit: the enigmatic, eccentric, and dangerously suicidal Osamu Dazai.

In this high-stakes supernatural mystery, witness the explosive beginning of a partnership forged in fire and absolute madness. What starts as a seemingly routine investigation into a suspicious new hire quickly spirals into a lethal game of cat and mouse involving the notorious Port Mafia. Set two years before the main events of the Bungo Stray Dogs series, this prequel reveals the hidden origins and the friction that defined the agency’s most iconic pair. Can an uptight idealist and a chaotic genius survive each other long enough to solve the case, or will the darkness of Yokohama's criminal underworld swallow them whole? Dive into the intense action, sharp wit, and mind-bending supernatural abilities that made this series a global phenomenon.

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