My Delicate, Lovely Sister-in-Law: What's Wrong with Protecting Her?

[Two heroines + transmigration into a book + ABO + sisters-in-law + devoted to each other + alternate history + sweet and satisfying wuxia adventure] <No unnecessary extras> [Bold and spirited Qianyuan wanderer (dominant) vs. frail but resilient Kunze (submissive)] After transmigrating into the book as the dead young aunt of a sickly character, Ning Lanzhen's first act is to kick open the doors of the Ning family ancestral hall! Everyone says Li Yunshu is a jinx who drove her groom away, and that she ought to kneel in the ancestral hall and be sent off to a country estate to die. But Ning Lanzhen refuses to believe such nonsense. Seeing the woman kneeling on the cold stone floor with blood seeping from her knees, she overturns the clan's rules on the spot: “The groom disappeared on his wedding night, leaving a frail Kunze at home to be punished. If our ancestors really are sitting in this ancestral hall, he should be the first to climb down from his memorial tablet and give that man a beating.” When Li Yunshu's cold illness and heat cycle flare up in an abandoned temple, Ning Lanzhen holds her and releases a soothing mint scent all night, not daring to touch the back of her neck, even with a fingertip. Others laugh at her. Why give up a comfortable life as a young lady just to take her frail sister-in-law wandering through the martial world? Ning Lanzhen grins. To hell with rules and taboos. Nothing matters more than keeping her sister-in-law rosy-cheeked and well-fed on sweets every day! - Along the long road ahead, she becomes her sister-in-law's blade, her home, and the only heaven she will ever know. Later, after Li Yunshu recovers from her cold illness, she tugs at Ning Lanzhen's sleeve beneath the red wedding candles, eyes reddened, and softly calls her “Lanzhen.” Ning Lanzhen's ears turn bright red. This transmigration into a book has been one hell of a bargain!