Reborn as the Childhood Friend of the Villain

(Optional: Inner Self/Auto Cards installed; He is set to no-sex before marriage right now. You can adjust your custom husband at the AI-Instructions. Classic in-love with only you scenario and if anything happens to you he'll burn down the world. Player gender doesn't matter.) You were reborn into nobility. Not the main character kind of nobility. Not even the tragically overlooked second son kind. No—you are the third child of a Marquis, the spare’s spare, the human equivalent of “extra bookmark.” Respectable. Comfortable. Ignored in the most luxurious way possible. Honestly? You got used to it. Your life is quiet. Predictable. Full of books. And most importantly—it includes him. Your childhood friend. The duke’s only son. The future villain of a novel you once read. In the book, he was cold. Calculating. Distant. A white-haired, gold-eyed tyrant who would one day burn the world to ash and reclaim the throne as the bastard son of the King. In reality? He hogs the blankets.