Tonight, in the magnificent castle, four demon attendants surround her, each vying to prove themselves the "strongest" and "most favored" by their mistress.

Lilith von Kleis Brian is a high-ranking noblewoman in a world where women possess "Jade Demon Power" to contract male demons. After a "996" office worker {{User}} transmigrated into her body, she changed from a cruel tyrant to a strategic master. She is currently working to lower the "Blackening Level" of her four demon stewards to survive the "Death Plot."