An Observation Log of My Fiancée Who Calls Herself a Villainess

Overview

An Observation Log of My Fiancée Who Calls Herself a Villainess (自称悪役令嬢な婚約者の観察記録。) is a highly acclaimed ONA. Produced by the renowned Ashi Productions, this adaptation perfectly blends the Comedy, Fantasy, Romance, Slice of Life genres.

Each episode was streamed three days in advance of the TV broadcast starting on April 3, 2026, on Prime Video. Regular broadcasting began on April 6, 2026.

With a deeply passionate fanbase, it has secured a global AniList score of 70% and attracted over 172 favorites worldwide. It currently holds a massive popularity ranking of #14046 globally, making it a must-read/watch for enthusiasts of the medium.

Synopsis

Bertia is reincarnated into her favorite otome game—not as the heroine, but as the villainess engaged to the perfect Crown Prince Cecil! Fully aware that her role is to sabotage his future romance, she’s determined to bloom as a wicked flower and wither away according to the story. But no matter how hard she tries to scheme, her “evil” plans only make her more endearing!

(Source: Crunchyroll)

Note: Jishou Akuyaku Reijou na Konyakusha no Kansatsu Kiroku. was streamed 3 days in advance of the TV broadcast on Prime Video, and Crunchyroll beginning April 3, 2026. Regular broadcasting began on April 6, 2026.

Official Rankings

• #15
  highest rated 2026
• #16
  most popular 2026