Katekyo Hitman Reborn!

Katekyo Hitman Reborn! (also known as Reborn! and Kateikyoshi Hittoman Ribon!) is a Japanese manga series written and illustrated by Amano Akira. It was adapted into an anime and serialized as both in the United States. The series follows the adventures of Sawada Tsunayoshi (known as No-Good Tsuna by classmates), a middle school student who is unwillingly thrown into the action-packed and often times frightening world of the mafia. An infant by the name of Reborn informs him that he is the tenth successor to the Vongola Famiglia, the world's most powerful mafia family. The series chronicles his acquiring of unique Famiglia members and the adversaries they must face as the most powerful family in the underground world of the mafia.