A six years old Tsuna encounters a Vendicare ninja and Bermuda and enters the mafia after she is diagnosed with a haemophilia. Years later, reborn finds himself at loss when he is trained to the next useless tenth boss candidate, who might not be so useless after all. Fem.Tsuna. Medic/Info broker Tsuna.

After the arcabaleno curse was broken and Tsuna Sawada crowned as the Tenth boss of Vangola family after finally turning thirteen. It just so happen a Hogwarts letter arrived for him on his thirteen birthday. How will the mafia survive magic? Moreover, how will the magic world survive Tsuna worshipping mafia? Not to mention Tsuna keeps attracting strange magical and ring animals.