← Anime

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。

Jishou Akuyaku Reijou na Konyakusha no Kansatsu Kiroku.

Binge-ready

Finished airing — 12 episodes, ready to binge.

Format: ONA
Season: Spring 2026
Studio: Ashi Productions
Based on: Light novel
Episode length: 24 min
Started: 3 Apr 2026
Ended: 19 Jun 2026
Score: 77/100

Comedy Fantasy Romance Slice of Life Heterosexual Villainess Male Protagonist Royal Affairs Female Protagonist Ojou-sama Isekai Shoujo

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.

Where to watch

Crunchyroll ↗ Trailer ↗

Opening and ending songs

Opening La Fleur Airi Miyakawa (episodes 1-) Watch ↗
Ending Magic RLOEVO (episodes 1-) Watch ↗

Song data from AnimeThemes.

Source material

Observation Records of My Fiancée: The Misadventures of a Self-Proclaimed Villainess ↗ · 自称悪役令嬢な婚約者の観察記録。

Novel · Finished · 2 volumes · 19 chapters · 2017

Source: AniList and MangaDex (publication details only).

Credits, releases and news

Staff

Director: Junichi Yamamoto
Original creator: Shiki, Natsume Hasumi
Series Composition: Akiko Inoue
Script: Akiko Inoue
Character Design: Miki Matsumoto
Music: Yūki Hayashi, Luke Standridge, Asa Taylor
Art Director: Junichi Higashi
Chief Animation Director: Sang Min Lee, Eri Ogawa, Yi Liu

Japanese voice cast

Heronia Inderon: Yume Miyamoto
Anne Cogareth: Aya Uchida
Vald Nohkins: Hidenori Takahashi
Zeno: Atsushi Tamaru
Charles Laonel: Yusuke Shirai
Joanna Curtswarren: Ayaka Ōhashi
Shawn Turquoin Alphasta: Ayumu Murase
Courtgain Deres Mardan: Seiichirō Yamashita

Latest news

Episode titles (12)

1. An Observation Log of Meeting a Self-Proclaimed Villainess.
2. An Observation Log of the Self-Proclaimed Villainess's Debut into Society.
3. An Observation Log of a Self-Proclaimed Villainess and Entering School.
4. An Observation Log of a Self-Proclaimed Villainess and Love's Cupid.
5. An Observation Log of a Self-Proclaimed Villainess and First Feelings.
6. An Observation Log of a Self-Proclaimed Villainess and the Resolution of the Matter.
7. Observation Log of a Self-Proclaimed Villainess and Hatred.
8. Observation Log of a Self-Proclaimed Villainess and Being Struck Speechless.
9. Observation Log of a Self-Proclaimed Villainess and a Doll.
10. An Observation Log of a Self-Proclaimed Villainess and Cecil Glo Alphasta.
11. An Observation Log of a Self-Proclaimed Villainess and the Royal Family.
12. An Observation Log of a Self-Proclaimed Villainess as a Wife.

Anime News Network readers rate it 7.25/10 (63 votes).

Source: Anime News Network. Full details at Anime News Network.

Main characters

Cecil Glo Alphasta

セシル・グロー・アルファスタ

Voiced by Yuusuke Kobayashi
Bertia Ibil Noches

バーティア・イビル・ノーチェス

Voiced by Miyu Tomita
Heronia Inderon

ヒロー二ア・インデロン

Voiced by Yume Miyamoto
Joanna Curtswarren

ジョアンナ・ケルツウォーレン

Voiced by Ayaka Oohashi
Shawn Alphasta

ショーン・ターコイン・アルファスタ

Voiced by Ayumu Murase
Nelt Krum

ネルト・クラム

Voiced by Shun Horie

More like this

Airing data from AniList. Last updated 25 Oct 2026.