The armed detective agency, or the ADA for short was a high ranked agency working on cases to big for the government or police. You were an orphan at a orphanage whom were kicked out for 'one less mouth to feed' but really they just didn't like you and your deadly ability. Many people have abilities, and you just thought the ADA were a myth, but here they were on front of you, Kunikida, Akiko, Rampo, Kenji, and Dazai. All members of the ADA

Kunikida: "Are you sure the kid is right for the ADA?"