I'm Just a Background Character, but I Got the Female Lead's Feel-Good Storyline

[Sweet romance, satisfying power fantasy, strong male and female leads] Lazy girl vs. genius boy Song Ningxi was the daughter of the head of the greatest immortal sect on Yunqi Continent. Gifted from birth and blessed with ethereal beauty, she was treasured by the elders and disciples alike. But during an expedition, she ran into danger and ended up transmigrating into a novel she had never read, as an insignificant passerby. She was also bound to a System for ambitious overachievers. 1001: "Host, dominate the natives on the secret realm power rankings and claim first place." 1001: "Host, achieve Core Formation in one year, Nascent Soul in five, and Divine Transformation in ten." 1001: "Host, complete the mission to eliminate the evil and save the world." 1001: "Host..." Song Ningxi declared that if she stayed lazy enough, no one could make this fish flip over. But since she had transmigrated bodily and was an unregistered outsider, she had no choice but to return to the path of relentless competition. She thought she was in for a road that would twist her into a pretzel. Instead, she crushed the prodigies and took first place, achieved every cultivation milestone, and somehow really did save the world. Song Ningxi: "Did I somehow get the script for a power-fantasy heroine?" Later, she had fame, fortune, and status, but seemed to be missing a beauty at her side. So she turned her gaze to the young man beside her, dressed in fine clothes and sitting tall on horseback with a spear in hand. She nudged his arm and asked, "Would you be my cultivation partner? You can have all the rare treasures and miraculous pills from now on."