Modern office drone Lin Shuang unexpectedly finds herself transported into an otome game world, becoming the duke's villainous noble daughter, Lilith Klein. The original owner met her end at the hands of her four powerful demon butlers, whom she had abused—resulting in them joining forces to kill her. Lin Shuang arrives immediately at the moment of her death crisis and binds with a "Strategy for Survival" system. The four butlers each possess distinct traits and terrifyingly high levels of darkening: the mad serpent Yekater, the cunning lop-eared rabbit Lyle, the berserk hellhound Ketlos, and the seductive bat Maud. To stay alive, Lin Shuang completely reverses the original owner's behavior, steadily navigating crises and winning over each of the butlers while lowering their darkening values. She foils the adoptive sister Vivian's schemes to seize power and restore her fallen kingdom, maneuvers through perilous situations on battlefields and at banquets, and ultimately subdues all four butlers. In the end, she rises to become the Duchess herself, achieving a happy ending with her four demon butlers who have come to genuinely care for her.
