Reborn

Tsuna, a timid junior high student, is a failure at school, in sports and in his social life.

But then, one day, everything changes for Tsuna when Reborn, a fedora-wearing, gun-toting toddler 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.