What happens when the worlds of Mafia and Magic collide? When the leader of a criminal organization turns out to be the prince of a hidden nation? And when his wife is revealed to be the true heir of the family he would give his life for? What happens when the lives of Xanxus, leader of the Varia and adopted child of Don Vongola, and Dorea, childe of Magic and head of house Potter and house Black, are brought together?