The Tyrant Brother is a Bonus

After winning a jackpot, a woman dies in a plane crash before she can enjoy her sudden fortune. She wakes up inside a book as its villainous princess, a character caught in a ruined reverse harem, and learns she can return to her original world—and the day she won billions—if she ends her engagement within a year. Her fiancé is determined to break off the marriage, so she tries to keep him close by offering to pay his debt. But he is not the only obstacle: his arrogant, tyrannical older brother keeps interfering, even demanding that she cancel the engagement. She must find a way to hold on long enough to get back to her money.