How Should I Resist Being Enslaved by a Corrupted Empress?

Charlotte, who thought her life was hopeless after being diagnosed with a terminal illness, transmigrates.

And transmigrates into the adopted daughter of a count!

She thought having an adorable, frail silver-haired girl around would be some comfort, but after awakening her succubus nature, she catches the eye of the empress, who has yet to turn evil!

She even discovers that the empress is actually the ultimate villain who will destroy the world!

Enslaved by the empress, all I want is to escape this misery and break free of her control, but... "Charlotte, you'll always be my personal plaything. I'll never let you escape."

Still enslaved by the corrupted empress today, how am I supposed to fight back?

(No toxicity, no cheating, just girls being lovey-dovey~)