"Kuji" kara Hajimaru Konyaku Seikatsu: Gensei Naru Chūsen no Kekka, Warawanai Jiki Kōshaku-sama no Konyakusha ni Tōsen shimashita

What if your entire future was decided by a lottery ticket? For one unassuming young woman, a single draw transforms her life overnight, thrusting her into an unexpected engagement with a man she’s never met. This isn't just any fiancé, however; he's the next in line to a prestigious ducal house, known throughout high society for his perpetually unsmiling demeanor. Now, she must navigate the intricate world of aristocratic expectations and unravel the mysteries behind her stoic betrothed. Can true affection blossom from such an unconventional beginning, or is she destined for a lifetime of formality with a man whose heart seems as cold as his expression?

✦ AI-drafted summary