Betrothed to My Sister's Ex poster
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Betrothed to My Sister's Ex Episode Ratings

Also known as: Zutaboro Reijou wa Ane no Moto Konyakusha ni Dekiai sareru

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The Shaderan family has fallen on hard times, and the avaricious and callous baron and baroness will stop at nothing to regain status. They favor their beautiful daughter Anastasia, hoping to marry her into wealth, while they treat the second daughter, Marie, no better than a servant. Years of abuse have convinced Marie that she is truly undeserving of love and attention. On Marie's birthday—used as a ploy to showcase Anastasia—Marie meets Count Kyros Granado, who is immediately charmed by Marie and her knowledge of his culture. Believing Anastasia to be the one he fell for, Kyros proposes via letter. But Anastasia tragically dies on her way to marry him. Forced to take Anastasia's place, Marie becomes Kyros' fiancée, just as he originally intended. Although Marie terribly lacks confidence, Kyros gently helps her find her worth, awakening her to her own beauty and the true meaning of being loved. [Written by MAL Rewrite]

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Betrothed to My Sister's Ex

12 episodes
8.6

Zutaboro Reijou wa Ane no Moto Konyakusha ni Dekiai sareru

E18.1
E28.5
E38.6
E48.7
E58.8
E68.8
E78.9
E88.8
E98.8
E107.7
E118.6
E128.6

Ratings last updated: October 8, 2026

At a glance

Episodes
12
Franchise
1 part
Aired
Jul 5, 2025 – Sep 20, 2025
Average rating
8.6/10
Best episode
Episode 78.9“You're So Close, I Think You May Make Me Dizzy”

Best Betrothed to My Sister's Ex episodes

  1. Episode 7You're So Close, I Think You May Make Me Dizzy8.9
  2. Episode 5The Prince and the Pitch-Black Warrior8.8
  3. Episode 6Am I Enough as I Am?8.8
  4. Episode 8A Gift More Lovely Than Jewels8.8
  5. Episode 9In Pursuit of Anastasia's Spirit8.8
Show 2 more
  1. Episode 4I've Found the Things I Like8.7
  2. Episode 11The Empty Princess Lives8.6

Lowest-rated Betrothed to My Sister's Ex episodes

  1. Episode 10Please Call Off the Betrothal7.7
  2. Episode 1I Could Never Replace My Sister8.1
  3. Episode 2Marie, I Want to Marry You8.5
  4. Episode 3A Life I Saw in a Dream, and a Dream-like Life8.6
  5. Episode 12It's Time to Settle This8.6

Betrothed to My Sister's Ex Episode Rating Chart

This episode rating chart shows all 12 episodes of Betrothed to My Sister's Ex, based on MyAnimeList ratings. The average episode score is 8.6/10. The highest-rated episode is Episode 7 "You're So Close, I Think You May Make Me Dizzy" with a score of 8.9/10, while the lowest-rated is Episode 10 "Please Call Off the Betrothal" at 7.7/10. 11 of 12 episodes (92%) score 8.0 or above, placing them in the Great or higher tier on the AnimeGraphs rating scale.

Betrothed to My Sister's Ex episode list

Show all 12 episodes
#TitleScore
1I Could Never Replace My SisterJul 5, 20258.1
2Marie, I Want to Marry YouJul 12, 20258.5
3A Life I Saw in a Dream, and a Dream-like LifeJul 19, 20258.6
4I've Found the Things I LikeJul 26, 20258.7
5The Prince and the Pitch-Black WarriorAug 2, 20258.8
6Am I Enough as I Am?Aug 9, 20258.8
7You're So Close, I Think You May Make Me DizzyAug 16, 20258.9
8A Gift More Lovely Than JewelsAug 23, 20258.8
9In Pursuit of Anastasia's SpiritAug 30, 20258.8
10Please Call Off the BetrothalSep 6, 20257.7
11The Empty Princess LivesSep 13, 20258.6
12It's Time to Settle ThisSep 20, 20258.6

Frequently Asked Questions

How many episodes does Betrothed to My Sister's Ex have?

Betrothed to My Sister's Ex has 12 episodes.

What is the best Betrothed to My Sister's Ex episode?

The highest-rated Betrothed to My Sister's Ex episode is Episode 7 "You're So Close, I Think You May Make Me Dizzy" (8.9/10) on MyAnimeList, followed by Episode 5 "The Prince and the Pitch-Black Warrior" (8.8/10) and Episode 6 "Am I Enough as I Am?" (8.8/10).

What is the lowest-rated Betrothed to My Sister's Ex episode?

The lowest-rated Betrothed to My Sister's Ex episode is Episode 10 "Please Call Off the Betrothal" (7.7/10) on MyAnimeList.

What is the average episode rating for Betrothed to My Sister's Ex?

The average episode rating for Betrothed to My Sister's Ex is 8.6/10 across 12 rated episodes on MyAnimeList. 11 of them (92%) score 8.0 or above.