An Observation Log of My Fiancée Who Calls Herself a Villainess

Name: An Observation Log of My Fiancée Who Calls Herself a Villainess
Genre: Animation, Comedy, Sci-Fi & Fantasy
Released: 2026-04-06
Rating: 7.9
Cast: Yusuke Kobayashi, Miyu Tomita, Yume Miyamoto, Ayumu Murase, Ayaka Ohashi

ENDED1 Season12 Episodes★ 7.9

An Observation Log of My Fiancée Who Calls Herself a Villainess is an animated comedy series on TOKYO MX that premiered in 2026, ending after 1 season and 12 episodes.

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NetworkTOKYO MX

First AiredApr 6, 2026

Last AiredJun 22, 2026

GenreAnimation, Comedy, Sci-Fi & Fantasy

Original Title自称悪役令嬢な婚約者の観察記録。

LanguageJapanese

CountryJapan

ProductionAshi Productions, AlphaPolis, THE KLOCKWORX

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!

WHERE TO WATCH

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Cast

Yusuke Kobayashi

Cecil Glo Alphasta (voice)

Miyu Tomita

Bertia Ibil Noches (voice)

Yume Miyamoto

Heronia Inderon (voice)

Ayumu Murase

Shawn Turquoin Alphasta (voice)

Ayaka Ohashi

Joanna Curtswarren (voice)

Shun Horie

Nelt Krum (voice)

Iori Saeki

Silica Lunea (voice)

Yusuke Shirai

Charles Raonel (voice)

Aya Uchida

Anne Kogares (voice)

Hidenori Takahashi

Vald Norgins (voice)

Mao Ichimichi

Cynthia Linnerith (voice)

Atsushi Tamaru

Zeno (voice)

Seasons & Episodes1 season · 12 episodes

0% complete

E1An Observation Log of Meeting a Self-Proclaimed Villainess.

Apr 6, 202624m

When Crown Prince Cecil is ten years old, he takes Bertia as his fiancée. She claims to have memories of her past life, and says that this is the world of an otome game she once played. She also says that she is a villainess. Cecil is generally bored, but her extraordinary statements spark curiosity in his heart.

E2An Observation Log of the Self-Proclaimed Villainess's Debut into Society

Apr 13, 202624m

Bertia struggles to correct the scenario she has unintentionally altered. At the same time, Cecil enters Halm Academy, a boarding school. During this time in which the two of them spend more and more time apart, Bertia's mother becomes pregnant and it leaves Bertia worried about one thing.

E3An Observation Log of a Self-Proclaimed Villainess and Entering School.

Apr 20, 202624m

Time passes and Bertia enrolls at Halm Academy, the same school as Cecil. At the same time, Heronia, the heroine of the otome game, also enrolls there. Wishing for a happy ending for Cecil, Bertia fights to bring the two of them together.

E4An Observation Log of a Self-Proclaimed Villainess and Love's Cupid.

Apr 27, 202624m

In order for Cecil to find happiness with Heronia, avoiding the reverse harem route is essential. For that reason, Bertia has decided to become love's cupid, pairing Cecil's personal aide candidates with other noble ladies.

E5An Observation Log of a Self-Proclaimed Villainess and First Feelings.

May 4, 202624m

Heronia grows impatient with the fact that the situation isn't unfolding according to the proper scenario and her attitude toward Bertia worsens. Since the moment Cecil left to study abroad, the harassment that Bertia faces, presumably spurred by Heronia, escalates by the day.

E6An Observation Log of a Self-Proclaimed Villainess and the Resolution of the Matter.

May 11, 202624m

When Cecil learns that Bertia has been pushed down the stairs, he's assailed by an emotion he's never experienced before. Together with the members of the student council, he sets out to take retribution. They gather everyone in the courtyard in order to catch the true culprit.

E7An Observation Log of a Self-Proclaimed Villainess and Hatred.

May 18, 202624m

Upon advancing to the high school division, Bertia begins avoiding Cecil. After turning the situation over in his mind, Cecil visits his father in order to investigate the nature of the Maiden of Destiny. The fated day, the graduation ceremony, quickly approaches.

E8An Observation Log of a Self-Proclaimed Villainess and Being Struck Speechless.

May 25, 202624m

It's the day of the graduation ceremony. Bertia is resolved to have the tables turned on her and be struck speechless just as the game scenario dictates, but Cecil has prepared something entirely different. Then Heronia speaks up, accusing the villainess Bertia of heinous crimes.

E9An Observation Log of a Self-Proclaimed Villainess and a Doll.

Jun 1, 202624m

Cecil has been knocked unconscious by the light spirit, Pii-chan, who makes him live in a what-if world in a realm of pure consciousness. The Cecil of that world, where everything unfolds according to the game's original scenario, is as cold and emotionless as a doll, and as Cecil experiences that for himself, his own consciousness begins drifting closer to that of a doll, too.

E10An Observation Log of a Self-Proclaimed Villainess and Cecil Glo Alphasta.

Jun 8, 202624m

Cecil wakes after witnessing Pii-chan vanish into nothingness, but Bertia's anxiety hasn't abated even though the judgement event is over. Cecil convinces Bertia to tell him about the different routes the future takes in the game scenario.

E11An Observation Log of a Self-Proclaimed Villainess and the Royal Family.

Jun 15, 202624m

At last, Cecil and Bertia commit themselves to each other in the truest sense, but the problem of how to deal with Heronia still remains. In order to keep his promise to Pii-chan, Cecil confronts Heronia.

E12An Observation Log of a Self-Proclaimed Villainess as a Wife.

Jun 22, 202624m

It's been two years, and the day of Cecil and Bertia's wedding ceremony has arrived. Believing that Bertia deserves to be the happiest bride in the world, Cecil works hard to fulfill her every wish. Watched over by family and friends, their ceremony proceeds in a way that is uniquely their own.

About An Observation Log of My Fiancée Who Calls Herself a Villainess

An Observation Log of My Fiancée Who Calls Herself a Villainess is an animation, comedy, sci-fi & fantasy series on TOKYO MX. The show first aired on Apr 6, 2026 and currently has 1 season and 12 episodes. An Observation Log of My Fiancée Who Calls Herself a Villainess has ended. It has a rating of 7.9/10 based on 27 votes. The cast includes Yusuke Kobayashi, Miyu Tomita, Yume Miyamoto, Ayumu Murase, Ayaka Ohashi.