He was kicked out of the orphanage after six to seven years of abuse, neglect and mistreatment from them. He is given a job and place to live by an old man that runs a bakery but three weeks later, he saves Dazai and soon joins Agency as a somewhat junior Detective. (Warning: This will have somewhat underage sex due to Atsushi being thirteen/fourteen) Tsuna-Is-Atsushi!

The sudden appearance of a baby girl already left Chuuya wary. Adding the fact that the baby had red-orange hair and greyish blue eyes, he becomes speechless. And now, in his home's dining room, he watched, agape, as the baby floated on her own from her chair with familiar red runes surrounding her. "…hell no"

In which the Mafia meets a Detective from a sophisticated agency, leds to the world grestest hitman plotting to get his dame-student a new Guardian. The Sudical maniac, Dazai Osamu decided to take a break and visits a new place as a holiday trip. where to go? Namimori Of Course! - Possible Rebornxdazai

Dazai was taken from his family at a young age. Tsuna lost his brother at a young age. They never imagined fate would bring them together once the emblem without a name returns to Yokohama. War between the most powerful organizations of Japan was inevitable. Would Tsuna be able to retrieve it which was stolen before Yokohama pays the price for power?

The Vongola Decimo has come to Yokohama to meet the infamous Port Mafia and initiate a very important treaty. But Lambo Bovino doesn't care about that! Might as well have some fun while his boss/ brother is on business. But why does this spells disaster for one Atsushi Nakajima and the Armed Detective Agency?