This au has a kind mori that created the agency after fukuzawa decided to kill the previous port mafia boss making him the new port mafia boss. Mori didn't like it one bit so he ran away. He didn't want his bodyguard a port mafia boss. He met this kid named chuuya Nakahara and created the agency And fukuzawa found Dazai and Dazai became the port mafia youngest executive so it's like a switch but with different people.