Cecil Glo Alphasta
main character
ONA
7.7
My TrackerPLANNING
Episode: 0 / 12
My Score:
Anime DetailsFINISHED
- Format
- web series (ONA)
- Episodes
- 12
- Episode length
- 24 min
- Total watch time
- 4 h 48 min
- Status
- Finished
- Aired
- April 3, 2026 – June 19, 2026
- Season
- Spring 2026
- Source
- Light novel
- Studio
- Ashi Productions
- Director
- Junichi Yamamoto
- Original creator
- Shiki
- Music
- Yuuki Hayashi, Luke Standridge, Asa Taylor
- Age rating
- PG — Teens 13 or older
- Country
- Japan
- AniList score
- 77/100
- Score across sites
- 7.56/10
Estimated watch time
4h 48m
⚡ 3 days at 5 eps/day
Tags & Tropes
Heterosexual95%Villainess92%Male Protagonist86%Royal Affairs85%Female Protagonist79%Ojou-sama79%Isekai77%Shoujo70%
ONAFINISHED2026 SPRING7.7 / 10 AniList score
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.
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.
Trailer
Watch on YouTubeMain cast & voice actors
Should you watch An Observation Log of My Fiancée Who Calls Herself a Villainess?
Probably, if you enjoy comedy, fantasy and romance, especially stories with heterosexual, villainess, male protagonist.
Fans rate it highly: 77/100 on AniList, with 64% of 8.5K ratings at 8/10 or higher. It's the #16 highest-rated anime of 2026.
Once people start, they tend to finish: only 4.1% of viewers drop it.
At about 4 h 48 min in total, it is a short commitment — a weekend binge.
Where to Watch Officially
Availability, audio and subtitles vary by region and service.
Episodes
12 episodes are listed.
Creators & key staff
- Original creator
- Shiki
- Director
- Junichi Yamamoto
- Series composition
- Akiko Inoue
- Character design
- Miki Matsumoto
- Music
- Yuuki Hayashi
- Music
- Luke Standridge
- Music
- Asa Taylor
Related entries
Opening & ending themes
Openings (1)
- OP1“La Fleur” by Airi Miyakawa · eps 1-
Endings (1)
- ED1“Magic” by RLOEVO · eps 1-
Theme data from AnimeThemes.moe.
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An Observation Log of My Fiancée Who Calls Herself a Villainess FAQ
How many episodes does An Observation Log of My Fiancée Who Calls Herself a Villainess have?
An Observation Log of My Fiancée Who Calls Herself a Villainess has 12 episodes of about 24 minutes each, roughly 4 h 48 min in total.
How long does it take to watch An Observation Log of My Fiancée Who Calls Herself a Villainess?
About 4 h 48 min back to back. At two episodes a day it takes 6 days; at one hour a day, about 5 days.
Is An Observation Log of My Fiancée Who Calls Herself a Villainess finished?
Yes. An Observation Log of My Fiancée Who Calls Herself a Villainess has finished airing — the final episode aired June 19, 2026.
Is there a season 2 of An Observation Log of My Fiancée Who Calls Herself a Villainess?
No sequel is listed for An Observation Log of My Fiancée Who Calls Herself a Villainess as of October 2026. You can continue the story in the original light novel.
Is An Observation Log of My Fiancée Who Calls Herself a Villainess based on a light novel?
Yes. An Observation Log of My Fiancée Who Calls Herself a Villainess adapts the light novel by Shiki.
Who animated An Observation Log of My Fiancée Who Calls Herself a Villainess?
An Observation Log of My Fiancée Who Calls Herself a Villainess was animated by Ashi Productions and directed by Junichi Yamamoto.
Who sings the opening of An Observation Log of My Fiancée Who Calls Herself a Villainess?
The opening, "La Fleur", is performed by Airi Miyakawa.
Where can I watch An Observation Log of My Fiancée Who Calls Herself a Villainess?
An Observation Log of My Fiancée Who Calls Herself a Villainess is listed on Crunchyroll. Availability varies by region — check the streaming links on this page.