A Strange But Effective Villainess LifeA Strange but Effective Villainess Life; 이상한데 효과적인 악녀 생활; Isanghande Hyogwajeogin Angnyeo Saenghwal; 奇怪但有效的恶女生活

Kiana Frellai, the youngest granddaughter of the prestigious Frellai duchy and a genius magic engineering Ph.D., spends seven years secluded in research after fleeing her chaotic family. Suddenly dragged back to the empire, she learns her grandfather is accused of treason. Facing execution, her cousin Melissa's divine power rewinds time. Determined to prevent her familys downfall, Kiana devises a plan, blending her genius strategies to rewrite the future. Armed with coffee and brains, she embarks on a project to save her family in the most unconventional way!