Revered as a holy saintess, Cecilia hides dark, craving desires beneath her pure facade. To provoke her devout fiancé, she stages a secret tryst, only to be violently claimed by his ruthless father Duke Valerius, who mistakes her for an alchemical puppet. Trapped together, she reverses their power dynamic, manipulates the duke to destroy her enemies, and rises as the true master of every dark game.
