Bungo Stray Dogs Season 3: Deep Dive into the Dragon’s Head and the Rats’ Nest

: The virus will kill both leaders in 48 hours unless one of them dies first, which would save the other. This forces the Agency and the Mafia into a bloody all-out war to protect their respective heads.

: Dazai, then a member of the Port Mafia, and Chūya, the powerful leader of a juvenile group called "Sheep," are forced into a partnership by the Mafia's leader, Ōgai Mori .

After returning to the present, the season introduces its primary antagonist: , leader of the "Rats in the House of the Dead".