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Story revolves around a boy who is chosen to become the Vongola (Italian clan). Family's boss due to him being the great-great-great-great grandson of the first Vongola boss, who had moved to Japan from Italy during his own time. He is told that he will become the tenth (Italian decimo) Vongola boss. Also, the other candidates for the position of the head of the Vongola Family have died. For these reasons, the protagonist is the only remaining heir. As such, Timoteo a.k.a. "Vongola IX", the current head of the family, sends an infant hitman from Italy, to train the boy. The protagonist then unwillingly undergoes training from Reborn. Reborn's main method of teaching he is the "Deathperate Bullet", which will make the person be "reborn" with a stronger self intent on fulfilling his dying will. Through his experiences, the initially clumsy and underachieving he unconsciously becomes stronger, more confident, and willing, which ultimately makes him better suited as the Vongola Family's boss despite continuing to reject his Mafia inheritance.
What is Katekyo Hitman Reborn?