Observation Records of My Fiancée: The Misadventures of a Self-Proclaimed Villainess ((Jisho Akuyaku Reijo na Konyakusha no Kansatsu Kiroku) is based on the light novel series written by Shiki and illustrated by Wan Hachipisu. Hanashi Media describes the premise as such:

Exceptionally gifted to his own detriment, Prince Cecil had always found life effortlessly mundane. One ordinary day, his life took an unexpected turn when he became engaged to Miss Bertia, the Chancellor’s daughter. This engagement, however, was anything but typical.

“Prince Cecil! I must confess – I am the villain of this story!” Bertia’s declaration was startling. She claimed to have memories of her former life, where she had been the antagonist in a “Otome game”. Her lofty ambition was to excel as a villainess and thus have her engagement annulled. However, despite her plans for various misdeeds, her attempts have always been unsuccessful.

Is her fiancé, who aspires to master villainous finesse, simply misguided in his endeavours?

Observation Records of My Fiancée started as a Shosetsuka ni Naro web novel. Two volumes of the light novels were released in 2017. Alphapolis publishes the series under the Regina Books label.

There is a sequel series titled Jisho Akuyaku Reijo na Tsuma no Kansatsu Kiroku, and manga adaptations of both.

Cast

• Director: Junichi Yamamoto (Maebashi Witches, More Than a Married Couple, But Not Lovers)
• Character designer: Miki Matsumoto (Summer Time Rendering)
• Series composer and scriptwriter: Akiko Inoue (GeGeGe no Kitaro Season 6 and One Piece co-scriptwriter)
• Animation production: Ashi Production