Overworked worker Lucinda dies and awakens in a matriarchal empire as the notorious villainous second princess. She once mistreated four S-rank fated mates and was manipulated by a “green-tea” pretty boy Marcel, ending in her poisoning. She activates a “Billionaire System”: spending on fated mates grants tenfold cashback and abilities. Lucinda changes everything—heals wolf-dog general Julius, calms berserk white tiger champion Yves, rescues merfolk marshal Ambrose, and wins over nine-tailed fox council leader Laurence.