the isekai detective lady ~please allow me to uncover the truth behind my favorite character's death

Detective and protagonist Hana Kurosu has somehow been transported into the world of her favorite historical mystery novel.

After rescuing an injured nobleman named Gabriel on the street, she discovers to her utter shock that he is the younger brother of her absolute favorite character! Invited to the Duke’s estate as a reward, she excitedly thinks, “Now I can finally meet my fave!”… only to learn that he has already died under highly suspicious circumstances.

Sinister rumors are swirling around the Duke’s household, targeting not only her deceased favorite but his younger brother as well. On the condition of being provided room and board at the estate, Hana sets out to investigate the conspiracies shaking the Duke’s family, and by extension, the entire nation, all while searching for a way back to her own world!

探偵の主人公・黒須華が何らかの理由で大好きな歴史ミステリー小説の世界に迷い込んでしまった。道端で怪我した貴族の男性ガブリエルを助けたら、なんとガブリエルは最推しの弟!お礼に公爵邸に招かれ、『これで推しに会える!』と思いきや、推しはすでに変死してしまった…推しのみならず、推しの弟まで良からぬ噂が囁かれている公爵家。公爵家に住ませてもらうことを条件に華は、公爵家ひいては国を動かす事件を調査しながら自分の世界に戻る方法を探る——。