My Little Sister Won't Let Me Leave After I Transmigrated!

One heroic rescue, one fatal mistake—Bai Ling wakes up in another world as someone's older sister. The deal seems simple: get close to her new little sister Bai Ke, earn system points, and return home. Easy, right? Wrong. Because somewhere between protective headpats and late-night confessions, the mission changes. Now Bai Ling's plotting to stay forever, transforming into a catgirl to win her sister's heart, and dreaming of a future that breaks every rule this world has. But when love collides with destiny, can two sisters rewrite fate itself?