Port Mafia leader Mori Ougai orders a 15-year-old Dazai to investigate rumors of the previous boss returning from the dead.
The third season of Bungo Stray Dogs is split into two primary narratives: an introductory flashback arc focusing on the past of Dazai and Chuuya, followed by the high-stakes "Cannibalism" arc in the present day. The Prequel: Dazai and Chuuya (Ages 15) Bungou Stray Dogs 3rd Season (Dub)
The season opens with a three-episode flashback adapted from the light novel Dazai, Chuuya, Fifteen Years Old . Port Mafia leader Mori Ougai orders a 15-year-old
Dazai meets Chuuya Nakahara, the powerful leader of a juvenile group called the "Sheep". Despite their mutual dislike, they form a reluctant partnership to uncover the truth behind a mysterious explosion and a god-like entity known as Arahabaki. Bungou Stray Dogs 3rd Season (Dub)