Tsunayoshi Sawada (Tsuna for short) is a cowardly junior high student who doesn't excel at academics or sports. But Tsuna's life takes a dramatic turn when Reborn, a suit-wearing, gun-toting baby who claims to be an Italian hit man, shows up at his house. Reborn was sent to Japan to groom Tsuna for his future life as a big Mafia boss.

Reads from right to left. First published in Japan in 2004 by Shueisha as Katekyō Hitman Reborn!