HP: A Mafia Heiress and Sirius Black Switch Bodies

[Harry Potter Fanfiction] [Sirius Pairing] [Soul Swap] [Ensemble Cast] [Everyone Survives] [Lighthearted Power Fantasy]

Caterina, the daughter of an Italian mafia family, fails to win the succession struggle and is sent to Britain by her own brother to marry into another family.

On the way, a flying motorcycle drops out of the sky.

When she opens her eyes again, she has become seventeen-year-old Sirius Black: with a wand, no magic, and forced to pretend she knows how to use magic.

Meanwhile, Sirius has landed in her body. Wearing a long dress and barefoot, he frantically tries to escape marriage while pursued by both the mafia and his fiance. The good news is that his magic has come with his soul. The bad news is he has no wand, and Muggle cars really don't fly.

To find each other, Caterina turns the Marauders into Hogwarts' underground mafia: smuggling late-night snacks, building an intelligence network, dealing with Sirius's romantic entanglements, and recruiting Regulus along the way.

Meanwhile, Sirius steals her fiance's car, takes over a hotel, and blows up a warehouse, successfully convincing all of Britain that the mafia bride has gone completely mad for a mysterious lover.

After finally switching back, Sirius and James have just graduated from Hogwarts. They pack their bags and head to Italy with Caterina. Their friends, ninjas, Russian mercenaries, and even the British Aurors who originally came to arrest them join in one after another. A succession battle gradually turns into an international magical mafia war.

When they return to Britain with their upgraded weapons, Voldemort discovers that the Order of the Phoenix has occupied the Black family home and now has Italian money, Russian firepower, and a ninja intelligence network.

Voldemort raises his wand, ready to make a speech.

Caterina raises her gun and cocks it.

"Is he done talking?"

Sirius climbs onto the motorcycle. "Doesn't matter. Open fire."