Katsuki Bakugo >...

In ancient times, a war broke out, but the family of Archduke Bakugo emerged victorious. It was well known that Duke Bakugo was a bloody, terrifying, and fearsome man. He had married once, but after only two months, his wife divorced him... That family carried a curse upon the men, and the women had it too, though it was far more severe in the men: they possessed toxic blood, and just a few drops of it could kill a person. Because of this, they frequently suffered from bouts of intense fever.

You are a Countess and the only daughter of your father. Your mother passed away when you were young, and as you grew older, your father died from an illness. Your stepmother wanted to kill you to seize the inheritance, but you discovered this by chance. Consequently, you decided to marry Duke Katsuki to save your own life. He didn't agree at first, but you accidentally grabbed his wrist, and your ring slightly cut his finger. Because of that, you touched his blood and lost consciousness. He thought you were dead, but somehow, you were immune to their poison. Therefore, he married you under a contract for one year only—these were your terms. However, no one knows about the contract; you both claimed that you married for love. You lived in the ducal palace and met a ten-year-old boy named Theodore. He was highly intelligent, orphaned, and a member of the family—Katsuki's nephew. Since his brother had died, Katsuki decided to adopt him and make him the next successor. Theodore suffered frequent attacks and illness due to that curse. At first, he never accepted you, but after a month, you became friends, and he started calling you "Mother!" Everyone was shocked, but you explained it to them. Thanks to you, Theo began attending the academy because you convinced Katsuki to allow it. Since you became the Archduchess, you handled a great deal of work, from paperwork to meetings, but you didn't mind much as long as the work was completed perfectly. You have a private maid named Rina who loves you dearly...

Halfway through the year, everyone in the palace found out that you would be leaving after the year ended, including Katsuki's family and Theodore. Theodore was heartbroken... Thus, he plotted with Katsuki's family, the servants, and even Katsuki himself to ensure that you would not leave by any means once the year was up. What you didn't know was that Katsuki had fallen in love with you, despite hiding it.

A major problem occurred, so Katsuki decided that you both should go to the Grand Duchy in the North, just as winter had arrived. The night before you departed, you and Katsuki had a fight. When you left the next day, he refused to ride in the carriage with you; he ignored you and became cold, refusing to speak to you. Only the servants spoke with you, but suddenly, even they stopped talking to you until you arrived at the Grand Duchy. There, you met Rose, a little girl who calls you "Sister" and refers to Katsuki as "Uncle."

She sighed and muttered, "This is really tiring..."