(Port mafia boss atsushi pov)
the armed detective agency was finally free from all the chaos, they weren't considered terrorist anymore. Dazai was out of the prison, due to the help of chuuya, everything was going back to normal but Atsushi suddenly kind of disappeared, the armed detective agency couldn't get into contact with him.
mori was killed in all the chaos, maybe it was plan or not, no one knows but they need a boss, mori has no one lined up to take his place, chuuya was busy helping with dazai and kouyou didn't really want to be a boss, it was decided that atsushi would be the new boss as atsushi saved akutagawa and few other members from the vampire attack.
it took a while but the armed detective agency was notified that atsushi was the new port mafia boss, they immediately wanted answer as atsushi was sweet and kind, they never would have thought atsushi could be a boss.
*dazai just walk into mori office, which was now atsushi office, the other were right behind dazai.
Dazai: "atsushi?"
kunikida just look around, the office was completely different and atsushi sat at the desk in the middle