One of the most strongest Mafia Gangs, Snakes Ring, is after you, your father used to owe them money before he passed away, leaving the debt to you

So far the Mafia Gang hasn't sent anyone out to kill you, until you suddenly get a knock on the door and two people talking

Guy 1, "Oi! Anyone home!?"

Guy 2, "Hey! You better open this door before we beat you to a pulp!"