 __Title:__ Vongola First Rain Guardian    __Birthday:__ 27 November  __Weapon:__ Ugetsu Asari's Four Irregular Swords  __Flame:__ Rain   The First Rain Guardian Asari Ugetsu, was Japanese, and loved music. It was said that there were none who could match his skills with the blade. He physically resembled Yamamoto, and Reborn compared Yamamoto giving up baseball to the first Rain Guardian giving up music: both did so to excel at swordsmanship for the sake of their friends in the Vongola Family. Specifically, the First Rain Guardian sold his instruments for a trio of short swords and a single long sword. Yamamoto's Kojirou can Cambio Forma into a similar sword, called Asari Ugetsu.   Weapons and Abilities Asari Ugetsu : Asari Ugetsu are one long blade and three short swords. It was said that the First Rain Guardian replaced his musical instruments with a similar weapon in order to help the Vongola in a time of crisis.   (Source: Reborn Wikia)

Nowadays, the mafia world is ruled by Italy's strongest family, the Vongola. Vongola's current head, ninth in the row, is an old man ready for retirement. But before he can hand down his position, he needs help from a professional Hitman to prepare the next generation Boss for ruling over Vongola and the mafia world itself. 
Sawada Tsunayoshi is just your ordinary teenage boy who attends Junior High and sucks at it. He is unpopular, has no friends, and is desperately in love with a girl from his class. But his life takes an extraordinary turn when Tsunayoshi meets Reborn, an infamous hitman, who the ninth boss of Vongola has sent to train Tsunayoshi for his upcoming title. 
(Source: Katekyo Hitman Reborn! FC)

Sawada Tsunayoshi is regular boy who has never excelled in sports, school or social life, thus being named "No Good Tsuna". Everyday, he leads just a normal life, living with his mother, while his father is away for work. But the thing Tsunayoshi doesn't know is that his family is actual lineage of the great Mafia Boss, the first head of Vongola, Giotto. 
Because of the Sawada history, Tsuna has been chosen to become tenth head of the Vongola family, an infamous Italian mafia family which rules the Mafia world. To become worthy of the title, Tsuna is being aided by professional hitman and infant, Reborn, who takes the role of Tsunayoshi's mafia tutor. 
(Source: Katekyo Hitman Reborn! FC)
 
Note: Chapter count includes two extra collections of short chapters published in volume 42