Mirai no Kuromakukei Akuyaku Reijou Moriarty no Isekai Kanzen Hanzai Hakusho

After a legendary confrontation, the mind of criminal mastermind James Moriarty finds itself reborn in another world, possessing the body of a bullied noble young lady. With no memory but his unparalleled intellect intact, he perceives the intricate web of social cruelty surrounding his new life.

This anime follows the "villainess without blood or tears" as she wields her genius for strategy and the perfect crime equation in a world devoid of a great detective. Moriarty's cold, logical brilliance is now dedicated to a single purpose: orchestrating flawless retribution against those who wield malice from the shadows, reshaping her destiny through calculated, intellectual warfare.