Even in Death, My Senior Sister Won’t Leave Me Alone

[Two female leads + reborn + coercive romance + giving up and doing nothing + switch couple] [World-weary junior sister, numb to life and death after countless lifetimes vs senior sister returned with memories of revenge] As the senior sister of a small sect, Gui Ning took the path of demonic cultivation. She blamed no one, for she had become the Demon Venerable. But by chance, she ran into the junior sister she had once ignored and secretly tripped up, only to be defeated by her... In the end, she was locked in a prison belonging to the righteous sects and tortured mercilessly. What junior sister? She's my enemy now. If there's another life, I'll make sure to cut her into a thousand pieces!!! The other one is Bai Cha, a junior sister who returns to the day she first began cultivating whenever she dies. In her most recent cycle, she finally succeeded in taking revenge and defeating her senior sister, and also caught a glimpse of the reason behind her endless rebirths... But repeating the cycle over and over has left Bai Cha almost obsessively fixated and completely unstable. She can neither live nor die... But why did Senior Sister fall to demonic cultivation? I need to set her straight next time around. She acts so cold and aloof, like she's so impressive. Bai Cha has another project now. But it seems Senior Sister can be reborn too? And she has even more resentment than I do? This is bad. How am I supposed to die now? There's no hope for me. ╮(╯＿╰)╭