My Junior Sister Can't Possibly Be Sweet on the Outside and Cruel Within

My name is Leng Zhixi, and I’m a sister-obsessed girl who’s desperately starved for affection. The person I love most is my older sister, Leng Shuying, but she’s been missing for five years. I exhausted myself searching for her, but got nowhere. My mother also died of illness, and with no one left to rely on, I met a System named Xiaoting. It claimed to be a fragment of the Heavenly Dao’s origin from a world of cultivation, and said it could help me find my sister. Somehow, I ended up following it to another world. Xiaoting said the heroine it had created had a tragic backstory: from the start, she was an orphan begging on the streets, and in the bitter cold, she was on the verge of starving to death. So it asked me to help the heroine get through her early hardships, become her guide, and find the right opportunity to nurture the romance between the male and female leads. As soon as I arrived in this world, I helped the heroine escape a beating, then gave her a piece of candy and took her in as my little sister. From then on, I raised the heroine, stayed by her side, and helped her develop a sound outlook on life. Following the plot Xiaoting had planned, the heroine and I made our way into the Taiqing Sect and eventually the Taiqing Sacred Land. All along the way, I did everything I could to foster feelings between the male and female leads, but in the end, things still didn’t go as planned. I’m a sister-obsessed girl myself, with a somewhat twisted personality and outlook on life. So the heroine I raised turned out twisted too, and she’s even more unhinged than I am. In front of me, she’s a little white rabbit; in front of everyone else, she’s a hungry wolf. At first, I didn’t believe what people said about her. Then she stabbed the male lead and cornered me against the wall, taking me for everything I had. “I’m telling you, your junior sister’s obedience is all an act. Don’t trust her!” “Impossible! How could my junior sister be a sweet-looking schemer?”