My Stray Husband is the Godfather

To escape an arranged marriage, mafia heiress Mia impulsively marries Vincent, a homeless drifter she just met. But she has no idea the quiet man sleeping on her couch is actually a retired underground king feared by every crime family. As enemies close in and her family faces collapse, Vincent steps back into the underworld to protect her—turning their fake marriage into a deadly power game neither of them can walk away from.