Marie Shaderan
main character
TV
7.3
My TrackerPLANNING
Episode: 0 / 12
My Score:
Anime DetailsFINISHED
Estimated watch time
4h 48m
⚡ 3 days at 5 eps/day
Tags & Tropes
Marriage93%Royal Affairs88%Female Protagonist85%Heterosexual83%Maids80%Ojou-sama79%Josei77%Body Image73%Iyashikei60%
TVFINISHED2025 SUMMER7.3 / 10 AniList score
Betrothed to My Sister's Ex
ずたぼろ令嬢は姉の元婚約者に溺愛される• Zutaboro Reijou wa Ane no Moto Konyakusha ni Dekiai Sareru
Synopsis & Story
Marie, the second daughter of a poor baron’s household, is treated like a servant by her parents. Even at Marie’s birthday party, her beautiful elder sister, Anastasia, is the star. Outside, Marie bumps into Count Kyuros Granado, who falls for her at first sight. Yet, due to a misunderstanding, the Count proposes to Anastasia. After a tragic accident, Marie must marry the count instead! (Source: Crunchyroll)
Trailer
Watch on YouTubeWhere to Watch Officially
Availability, audio and subtitles vary by region and service.
Featured Cast & Voice Actors
Franchise Universe & Related Entries
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Aniphoria guide
Betrothed to My Sister's Ex: should you watch it?
At a glance
Betrothed to My Sister's Ex has been well received, with an average AniList score of 73/100 — 48% of 7,809 ratings are 8/10 or higher.
It ranks #64 highest-rated anime of 2025, and #24 highest-rated anime of Summer 2025, and #28 most popular anime of Summer 2025 on AniList.
Of the 18.7K AniList users who started it, 5.9% dropped it, so it is dropped at a typical rate; 13.7K have finished it.
At about 4 h 48 min in total, it is a short commitment — a weekend binge.
Best for viewers who enjoy Drama, Fantasy, Romance — especially marriage, royal affairs, female protagonist, heterosexual.
Episodes
12 episodes are listed.
Main cast & creators
- Original creator
- Tobirano
- Director
- Takayuki Kitagawa
- Series composition
- Kenta Ihara
- Character design
- Akiko Satou
- Music
- Kujira Yumemi
Opening & ending themes
Openings
- OP1“Gesshoku” by krage · eps 1-
Endings
- ED1“Marie” by Myuk · eps 1-
Theme data from AnimeThemes.moe.
Betrothed to My Sister's Ex FAQ
- How many episodes does Betrothed to My Sister's Ex have?
- Betrothed to My Sister's Ex has 12 episodes of about 24 minutes each, roughly 4 h 48 min in total.
- How long does it take to watch Betrothed to My Sister's Ex?
- 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 Betrothed to My Sister's Ex finished?
- Yes. Betrothed to My Sister's Ex has finished airing — the final episode aired September 20, 2025.
- Is there a season 2 of Betrothed to My Sister's Ex?
- No sequel is listed for Betrothed to My Sister's Ex as of October 2026. You can continue the story in the original light novel.
- Is Betrothed to My Sister's Ex based on a light novel?
- Yes. Betrothed to My Sister's Ex adapts the light novel by Tobirano.
- Who animated Betrothed to My Sister's Ex?
- Betrothed to My Sister's Ex was animated by LandQ studios and directed by Takayuki Kitagawa.
- Who sings the opening of Betrothed to My Sister's Ex?
- The opening, "Gesshoku", is performed by krage.
- Where can I watch Betrothed to My Sister's Ex?
- Betrothed to My Sister's Ex is listed on Crunchyroll, Bilibili TV, YouTube. Availability varies by region — check the streaming links on this page.