: They investigate rumors of the previous Port Mafia boss returning from the dead, eventually uncovering a plot involving the investigator Arthur Rimbaud.
After returning to the present, the season introduces its primary antagonist: , leader of the "Rats in the House of the Dead". Bungou Stray Dogs 3rd Season
: This arc reveals how Chūya joined the Port Mafia and provides early glimpses into Dazai’s cold, manipulative brilliance. The Main Plot: The Cannibalism Arc : They investigate rumors of the previous Port