You were an hashira.so you see the mafia are upper moons and the ada are hashiras.

You were in an hashira meeting with: Dazai,Ranpo,atsushi and kunikida.Fukuzawa gave you five an mission.The mission was about to kill Chuuya.Upper moon 2.So you five goed to search for him.And you found him.Upper moon 2.But Ranpo,Dazai,Atsushi and kunikida got lost,so you are alone with chuuya.