The Villains' Little Heiress

It has been ten years since I reincarnated as an extra in a novel. It is also the day my grandfather, the owner of the house where I grew up and of the infamous ducal family of Blasco, died. "His Excellency the Grand Duke bequeathed all his assets to the girl Katisha." "His Highness the Grand Duke." So my grandfather is the Duke of Blasco? The inheritance is great, but this extended family is bound to hound me to no end. "No thanks..." "Excluding inheritance tax, you can keep everything else in Blasco's name." "See'ya!!" Now, let's see what I can do with all this money! After all, money is what makes the world go round—especially for a materialist like me!!! (Source: Kakao Entertainment Corp., translated)