My Scumbag Ex Marries My Half Sister? I Seize the Chance to Marry the Heir and Earn a Noble Title

[One-on-one romance, two strong leads, both devoted to each other] Bai Sangyu, the legitimate daughter of the prime minister, should have been born with a silver spoon in her mouth, raised in luxury and treated like a princess. Instead, a concubine's daughter was switched with her, and Bai Sangyu grew up timid, unloved by both her parents. The fake younger sister, meanwhile, was clever and became the most admired beauty in the capital. She fought desperately to save the prime minister's residence from ruin, but on the eve of her wedding, her younger sister lay on the bed that should have been hers, smiling seductively with a face full of desire. “Sister, thank you for finding such a promising future for my husband.” With a wave of her delicate hand, a three-foot blade fell, and blood spread across the dungeon floor. After dying a bitter death, she returns reborn, and Bai Sangyu flips the table on the spot: To hell with being meek and submissive! I'm done! As she devotes herself to building her career, a former husband she has never met suddenly appears from nowhere. Resting his forehead on one hand, he watches her cruelly deal with scoundrels and smiles indulgently. Bai Sangyu raises an eyebrow. “Aren't you afraid of me like this?” Her former husband smiles faintly. “Loving someone is like tending a flower, even if she's a prickly cactus that bites.” Bai Sangyu scoffs. “You might not be able to handle picking me.” Xie Fengjun, heir to the Marquis of Dingnan, has been frail and sickly since childhood and is known as the capital's number-one wastrel. Who would have guessed he's a master at playing the fool to catch the tiger? His political enemies coax and trick the wastrel heir into going off to war, expecting a laugh, but they end up becoming the joke themselves. With military power in his hands, the young lord rubs his wrist, still eager for more, and sweeps his mocking phoenix eyes over the ministers, who are cowering like quails. But before a certain someone can show off his skills, someone grabs him firmly by the ear without the slightest courtesy. “You win one battle and think you can stay out all night? Get your butt home and kneel on the washboard for me!”