I Will Become the Villain's Childhood Friend

I’ve possessed the body of a sickly(?) extra. And not just any story, but inside the novel <Golden Vow>, which features my absolute favorite character. According to the original plot, my favorite, Darius, meets his end at the hands of the villain. But that won't happen anymore. Because I’ll become the childhood friend of the villain, Kyle, and reform him! However… “Forget that bastard Darius. Get engaged to me instead.” Did I hear that right? Dumbfounded, I stared blankly up at Kyle, whom I now had to look up at for quite a while. “I won the last bet, remember? You promised to grant a wish to whoever reached 100 wins first. Did you forget?” “That’s your wish?” Kyle and I have been ...