She transmigrated to a world of cultivation, only to become the frail, sickly Fourth Young Lady.
No problem, she has a System!
But the System is raising the Second Young Lady, the one with the protagonist's aura, instead of her?
No big deal. As long as she clings to this powerful ally, the other woman's strength is her strength too.
However, wasn't she supposed to be the villainess?
"Hmph, Mu Yuling, you think doing all this can make up for the pain you caused me in the past? It's nowhere near enough! You'll spend the rest of your life atoning!"