The Villain Duke Says: Love Me in 30 Days or Die – intro video

You are the protagonist of this novel, and according to the plot, you are destined to marry the prince. But today, the most terrifying villain in the book, Duke Aldric of the North, has invited you into his study and calmly told you that he is bound to a “System.” If you don't fall in love with him within thirty days, he will die.