Reborn Arrives! (リボーン来る!, Reborn Kuru!) is the 1st volume of the Katekyō Hitman Reborn! manga.
- Chapter 01: That Guy From Italy (イタリアからやってきたアイツ, Itaria Kara Yattekita aitsu)
- Chapter 02: Dying Will Bullet Unusable (死ぬ気弾使用不能, Shinu Ki Dan Shiyō funō)
- Chapter 03: Hayato Gokudera (獄寺 隼人, Gokudera Hayato)
- Chapter 04: Expel Crisis (退学クライシス, Taigaku Kuraishisu)
- Chapter 05: Takeshi Yamamoto (山本 武, Yamamoto Takeshi)
- Chapter 06: Russian Roulette (ロシアンルーレット, Roshian Rūretto)
- Chapter 07: Crybaby Lambo (泣き虫ランボ, Nakimushi Ranbo)
Infant Reborn is a hitman for the Mafia. He is sent to Japan to train teenager Tsunayoshi Sawada so that he can become the next boss of the most powerful Mafia group, the Vongola Family. Tsuna considers himself a loser until Reborn shoots him with the Dying Will Bullet. This makes him stronger physically and mentally, allowing him to perform amazing feats. He is eventually able to become friendly with his crush, Kyoko Sasagawa, and befriends baseball player Takeshi Yamamoto after stopping him from committing suicide. As part of his training, he begins meeting members of the Mafia, who have mixed reactions to him. Dynamite expert Hayato Gokudera initially wishes to kill the boy, but later strives to become his right-hand man. Another infant assassin, Lambo, introduces himself by trying to kill Reborn, but instead starts living with them.