Episode 26

Dazai, Chūya, Fifteen Years Old (太宰、中也、十五歳) is the 26th episode of Bungo Stray Dogs anime series. It first aired on April 12, 2019.

Synopsis
Port Mafia leader Mori Ougai orders a fifteen-year-old Dazai Osamu to investigate the appearance of a certain individual in the Yokohama Settlement area.

Summary
A young man infiltrates a plane and kills a Port Mafia guard.

Mori and Dazai is seen in Mori's clinic. In the past, Mori is seen talking to the former Port Mafia boss to which the latter is on his deathbed and gave instructions to Mori to take down Port Mafia's enemies. Mori proceeded to kill him and appoints himself as the next boss as per the former boss' orders, making Dazai a witness.

At the present, Mori gives a job to Dazai to investigate someone at the Suribachi City with a Silver Oracle in exchange for giving Dazai a way to end his life comfortably.

Dazai and Hirotsu is seen at Suribachi City to investigate. Suddenlly, Dazai receives a call from Mori and states to Mori that he have seen the previous boss. In the middle of the conversation, he was attacked from behind by someone. The person demands Dazai to tell him about Arahabaki - the person turns out to be the leader of Sheep, Chūya Nakahara.

Hirotsu demands Chūya to surrender but the latter refuses to do so. The two engage in a battle but Dazai manage to nullify his ability. Chūya attacks Hirotsu again. In the middle of the battle, a sudden explosion appears in the middle of the city and reveals the former Port Mafia boss.

Chūya is seen restrained in Mori's room. Mori questions him about attacking the Port Mafia guards. Chūya proceeds to asks about their investigation on Arahabaki. Mori asks Chūya if he wants to join the Port Mafia to which Chūya refuses. Chūya also learns about the truth of Mori killing the previous Port Mafia boss. Mori proceeds to have Chūya in a joint investigation about Arahabaki - much against the latter's will having his members in danger if he refuses.

Chūya offers to exchange information about Arahabaki to Mori. Mori proceeds to show Chūya their sighting of the previous Port Mafia boss at Port Mafia vault and shares information about what he knows about Arahabaki. Chūya also shares his information about the cause of explosion at Suribachi City. Mori then orders Dazai to investigate the person responsible for the explosion together with Chūya.

Dazai and Chūya is seen together on their way to interview people who were closest to the explosion particulary a survivor of the explosion one week ago. Suddenly, a explosion occurs nearby. The two rush to the site and see the building where the survivor resides, on flames. They are then stopped by the a person who did the cover-up.

Abilities

 * Upon the Tainted Sorrow
 * Falling Camellia
 * No Longer Human
 * Illuminations