(System + Cultivation) How to Thrive in the Radiance of My Mary Sue Sister

Also known as My Domineering Older Sister Fell for Me. How do I stop my sister from turning evil? Help, urgently! He was one of the most powerful figures in the demon realm, bewitching and alluring, with a face as lovely as a woman's. Then one day, he was gravely injured and rescued by Lin Ling at the Jiaoyun Pavilion. From that day on, he clung to her. "Since you saved me, I'll repay you with myself! I'll definitely treat your sister well!" Lin Ling: What the heck? What does saving you have to do with my sister?! He was her senior fellow disciple, gentle, refined, and always kind to her. One afternoon, at the Jiaoyun Pavilion, he finally confessed his feelings. "Um... I..." He squeezed his eyes shut and finally blurted it out: "I want to cultivate dual cultivation with your sister. Do you approve?" Lin Ling: "Oh!" He asked, "Don't you have anything to say?" Lin Ling: "Nope. I'm used to it by now..." Lin Ling: "Hey, are you really my mom? Am I really the protagonist?" The author: "Your golden finger is your older sister." Lin Wan: "I'd be happy to be your golden finger, too." In short, this is the story of a girl who, despite being overshadowed by her Mary Sue older sister, still manages to make her own way and prove herself formidable. P.S. Lin Wan is reborn and a little evil. Lin Ling and Lin Wan are not biological sisters. My completed Western fantasy novel: How to Stay Patient with a Protagonist You Hate My completed cultivation novel: What Do I Do When My Crush Keeps Getting My Gender Wrong? My ongoing Western fantasy novel: What Do I Do After Choosing the Wrong Target to Pursue? Theme: