Demoness, Stop Chasing Me! I Only Want My Righteous Junior Sister's Favor

Captured and turned into a blood bag by a breathtaking demoness—not exactly the cultivation start you dreamed of. But you've got a secret weapon: a system that converts favor into raw power, skills, and even stolen talents. Starting at -50 affection with your captor? Perfect. One spark of curiosity nets you +10 favor and a year's worth of cultivation overnight. As she drains you daily, you face a choice: accept your fate as livestock, or game the system to win over the demoness, seduce the righteous sect, and claim the cultivation world itself?