Reborn as the Villain’s Sickly Younger Sister

[New novel, Deliberate Entanglement, now underway] Lu Nian transmigrates into a book, becoming a frail female side character with no real bearing on the plot. The only daughter of the wealthy Lu family, she is a delicate, sickly beauty. In the original story, this little cannon-fodder character dies after just a few chapters. Unfortunately, to support their precious daughter, the Lu family brought home an adopted older brother from an orphanage when she was little. He may be called her brother, but in truth, he is her servant. His status in the Lu family is low, he is treated like a dog, and anyone can beat and scold him. After transmigrating, Lu Nian sees a pale, handsome boy being trampled underfoot. His gloomy, cold eyes are fixed on her from nearby. When she hears his name, she shudders. Isn't this the young version of the story's biggest villain? The last head of the Lu family, cold and heartless, ruthless in his methods, and wielding immense power. He avenges every wrong he suffered in his youth, and nearly takes the male lead down with him. Terrified out of her wits, she decides to treat him well for what little time she has left, hoping that once he turns evil, he'll at least spare her life. * Qin Si never imagined that one day he would receive such tenderness, given to him as if from between her fingers. His secret, growing obsession comes true. As long as she looks at him a little longer or gives him one more smile, he can give up everything, even his life. [A healing, gentle, sickly beauty X a cold, gloomy, obsessive boy] A quick note: 1. The male and female leads are not related by blood. The male lead was not adopted by the female lead's parents or relatives. He was only placed with her family, and they are not on the same household registration, so there are no legal or ethical issues. 2. The usual setup and flavor, as always. I've saved a screenshot of the blurb~ * [Recommendation time]: Check out the super-sweet romance, The Little Rose's Hot Kiss, by Zhi Cong Yi Gen. You can search for it~ I'd also like to recommend my upcoming novel, May the Gods Deliver Me. Blurb: 1. When Chu You was sixteen, she was sent to live with the Ji family. She was careful with every word and action, afraid of making even one mistake. The Ji family has three sons, all handsome and refined. The youngest, Ji Xueshu, is blind. Rumor has it he's an illegitimate son of unknown origin, and anyone can bully him. The day Chu You arrived at the Ji home, she saw the boy in the snow, his lips pale from the cold as he picked up his books one by one from the ground, their pages trampled dirty. Yet he was still as beautiful as a painting. Close in age and sharing the same misfortune, she considers him her best friend. They look after each other, keep each other warm, and get through the hardest years together. 2. After starting university, Chu You is finally able to fly free. Then, in late spring, circumstances force her to return to the Ji family estate. The Ji family wields immense power, and the young men of this generation are all twisted in their own ways. Soaked by the rain, she flees the Ji estate in the dead of night. At the end of the corridor, a shadowy figure stands. It is the pale, beautiful face from her memories. The man's long, cool fingers gently brush her cheek, tender and soothing, their tips damp with rain. As if seeing her savior, Chu You takes his sleeve with trembling hands and begs him to get her out of the Ji estate. But when she comes to again, the lights are dim and her head is foggy. He gently strokes her lips, drawing close with hesitant care, and murmurs like he's dreaming, "But I like you so much, too." I like you so much, more than anyone / I remember your scent, the feel of you / The Ji family belongs to me now. Will you belong to me, too? [That day, she fell from the sky, like a dream of blossoms, beautiful but fleeting.] [May the gods deliver me, yet I yearn for the gods.] [Gentle, sickly obsessive boy x bright, sunny girl] Premise: