The Eldest Princess of the Prosperous Dynasty

Taking her younger brother to crawl around in a palace that eats people without spitting out bones, she didn't want to fight for anything, but she was forced to fight! He strategized and planned, and watched his brother move towards the supreme position step by step. The great cause was finally accomplished, but he met a madman who only loved beauty but not the country. "Want to marry me? Can you afford the bride price?" "I've been thinking about this for ten years. What do you think about me using the entire country as a betrothal gift?"