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Betrothed to My Sister's Ex

Betrothed to My Sister's Ex

TV-142025•8.2/10
AnimationComedyDrama

Ratings

🎬TMDb
8.2/10(25)

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!

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Production

LandQ Studios, Futabasha, NK Animation, MBS, Pierrot, Starry Cube, Bit grooove promotion

Language

JA

Status

Ended

First Aired

July 5, 2025

Last Aired

September 20, 2025

Networks

MBS, TBS, CBC

Trailers & Videos

Where to Watch
Region US · Lang EN
US
No providers available for this region.
Seasons & Episodes
Select a season to view episodes. Reddit links may contain spoilers.
Season
I Could Never Replace My Sister
E1
I Could Never Replace My Sister
Air date: 2025-07-05
Marie is always dressed in tatters and is treated like a servant in her own home. Then she meets Count Kyros.
Marie, I Want to Marry You
E2
Marie, I Want to Marry You
Air date: 2025-07-12
Kyros hates aristocratic society and its ties of obligation. But why? And what changed when he met Marie?
A Life I Saw in a Dream, and a Dream-like Life
E3
A Life I Saw in a Dream, and a Dream-like Life
Air date: 2025-07-19
Marie begins her new life as Kyros' fiancée and finds herself bewildered by the differences from her old life.
I've Found the Things I Like
E4
I've Found the Things I Like
Air date: 2025-07-26
Kyros wants to provide Marie with every comfort, but Mio cautions him. Then a package from the baron arrives.
The Prince and the Pitch-Black Warrior
E5
The Prince and the Pitch-Black Warrior
Air date: 2025-08-02
Luiphon takes Marie to a sword fighting contest. The ferocity of it scares her. Then the dark warrior fights.
Am I Enough As I Am?
E6
Am I Enough As I Am?
Air date: 2025-08-09
Liu Liu, Kyros' mother, discovers surprising things about Marie. Mio investigates the baron on Kyros' orders.
You're So Close, I Think You May Make Me Dizzy
E7
You're So Close, I Think You May Make Me Dizzy
Air date: 2025-08-16
Mio investigates a comment in a letter from Marie's brother. Marie and Kyros go to the capital for a date.
A Gift More Lovely Than Jewels
E8
A Gift More Lovely Than Jewels
Air date: 2025-08-23
Kyros and Marie meet Luiphon at a jeweler's at his request. Thoughts of Anastasia haunt Marie's happiness.
In Pursuit of Anastasia's Spirit
E9
In Pursuit of Anastasia's Spirit
Air date: 2025-08-30
Kyros demands the truth of Anastasia's accident, but he and Marie are not prepared for the answers they find.
Please Call Off the Betrothal
E10
Please Call Off the Betrothal
Air date: 2025-09-06
Worried, Kyros arranges to meet with Norman. But as Marie hears him describe his apprentice, her fears grow.
The Empty Princess Lives
E11
The Empty Princess Lives
Air date: 2025-09-13
Marie's attacker talks about the past. Why did little Marie's life change so much? Why was she left in rags?
It's Time to Settle This
E12
It's Time to Settle This
Air date: 2025-09-20
Marie is determined to settle things. But even with everyone's help, how will she confront her parents?

Cast

Rena Motomura

Rena Motomura

Marie (voice)

Daiki Hamano

Daiki Hamano

Kyros (voice)

Minami Tanaka

Minami Tanaka

Anastasia (voice)

Ryohei Kimura

Ryohei Kimura

Louisphon (voice)

Yoko Hikasa

Yoko Hikasa

Mio (voice)

Sayaka Ohara

Sayaka Ohara

Ryu Ryu (voice)

Tetsuya Kakihara

Tetsuya Kakihara

Toppo (voice)

Tatsuyuki Kobayashi

Tatsuyuki Kobayashi

Thomas (voice)

Yuuka Aisaka

Yuuka Aisaka

Tunica (voice)

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