Japanese

未来の黒幕系悪役令嬢モリアーティーの異世界完全犯罪白書

After a showdown with a great detective, the most feared criminal, James Moriarty, met his end. He suddenly found himself reincarnated in another world, possessing the body of Sherry Moriarty, a beautiful young lady being bullied by the daughters of noble families! Using the power of his brilliant mind, he creates the perfect crime for the sake of this single girl. In a world without a great detective, the curtain rises on a cold-hearted, intellectual revenge drama between the two Moriartys.

(Source: Official Site, translated)