The Chancellor’s Crimson Attire

[Wicked and carefree vs. obsessively devoted and lovesick] She is a princess of the royal manor, born to privilege and destined for a life of wealth and honor. But after a conspiracy leaves her father dead in battle and her elder brother dead before his time, she willingly casts off her red robes to prop up the manor, taking her brother's place as its heir. From then on, the capital gains a dissolute, free-spirited young lord, a notorious wastrel! She flirts with beauties, teases princes, and toys with royal sons... There is nothing she wouldn't dare do in the capital. In public, she is a devil-may-care, good-for-nothing wastrel, wicked, carefree, and flamboyant. In private, she manipulates power and plays on people's hearts, turning the clouds with one hand and bringing rain with the other. She can play with flirtation, keep her heart and body pure, plot to conquer the realm, and command the game of power, yet... she accidentally seduces her enemy and romantic rival. An enemy? She crippled his legs five years ago. A romantic rival? Five years later, he stole her fiancee! You could say their hatred is truly irreconcilable. Little does she know that from the moment the marriage was decreed, she had fallen into the other man's carefully laid trap of entanglement. From then on, she plots to conquer the realm while he plots to win her! The female lead spoils the male lead to an extreme degree!!! The male lead spoils the female lead in a twisted, obsessive way!!! (She disguises herself as a man, one-on-one romance, both leads are chaste, strong male lead and strong female lead.) Content warning: The female lead is no good person. She is wicked, carefree, and ruthless. If that's not your thing, proceed with caution!