Sent to the Palace to Help My Legitimate Sister Win the Emperor's Favor? The Tyrant Holds Me Close and Spoils Me Every Day

[Palace intrigue + sweet romance + rising to power and crushing the villains] [Pampered, spoiled, and charming consort × Violent, scheming emperor] Yun Jinshu transmigrates into a book, becoming a cannon-fodder supporting character in a palace-intrigue novel. Her stepmother and father scheme to secure the emperor's favor for her legitimate elder sister, and go to great lengths to send the simple-minded, arrogant, and overbearing Yun Jinshu into the palace. But they don't know that it's all an act. When Yun Jinshu learns she's about to be sent to the palace, she smiles. Enter the palace to win favor for her sister? She intends to become the emperor's favorite instead! Now that she's in the game, she'll play to win. From then on, the harem gains a beauty who knows exactly how to compete for favor. With her peach-blossom face and skin like jade, she's talented in literature and dance, and understands the emperor's heart. She always finds a way to surprise him. In just three years, she becomes the most favored woman in the palace, rising from a seventh-rank Talented Lady to the most honored Noble Consort. Xiao Jingqi is a brooding, devious man with a violent nature. He murders his brothers and seizes the throne, then sets about reforming the government. He is sick of the false affection of everyone in his harem, but never expects one woman to be different from the rest. At first, he's merely curious and can't help stealing a few glances. He never imagines it will last a lifetime. [Not a mutually exclusive romance; he favors her early on and devotes himself to her alone later]