My Tyrant Brother Comes as a Gift

Damn it! When I opened my eyes, I was inside the world of a book. And of all things, I had become the villainous duchess of a dark reverse-harem novel. What...? If I keep this engagement going for just one year, they’ll send me back to my original world? Back to that exact day when I cashed out profits worth tens of billions? Dear God, thank you! I thought everything would be easy, but—! “I find even the thought of touching you disgusting, so I’m calling off our engagement.” My fiancé hates me! And he’s not just cold—he’s completely impossible to break through! N-No, wait! Please, just hang in there with me a little longer...! “What if you put up with it for just three months, and I pay off your debts?” Right, so I thought I’d pretend to pay off this man’s debts and just survive one year somehow... but the problem was, he wasn’t the only obstacle! “Hey. Come here. I said come here.” “Why?!” “Turn off the lights.” “……” This man picks fights with me over every little thing just because he’s my brother. And to make it worse, he’s the male lead of the book—a tyrant! “Hey, didn’t I tell you to break up with him? End the engagement!” He’s even interfering with my engagement! Will I ever make it back safely to my precious crypto?