Cielcy DiVentresca and Tsunayoshi 'Tsuna' Vongola are betrothed at birth, intended to bring peace between the two families. The two unwilling pair meet and problem arises from being sent from Italy to Japan due to them fighting. (Better than summary I swear)

Tsuna, ever since he was a kid, he was always protected from bullies by this tomboy girl, named Fuyu DelaRosa. He didn't know why, but they became friends quickly. But that is until she moved away in fourth grade. "Ne! Tsuna-kun! This ring will have an invisible string that will always keep us together no matter what! So you better not lost it! Promise?"