Betrothed to My Sister's Ex

Name: Betrothed to My Sister's Ex
Genre: Animation, Comedy, Drama
Released: 2025-07-05
Rating: 8
Cast: Rena Motomura, Daiki Hamano, Minami Tanaka, Ryohei Kimura, Yoko Hikasa

ENDED1 Season12 Episodes★ 8.0

Betrothed to My Sister's Ex is an animated comedy series on MBS that premiered in 2025, ending after 1 season and 12 episodes.

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NetworkMBS

First AiredJul 5, 2025

Last AiredSep 20, 2025

GenreAnimation, Comedy, Drama

Original Titleずたぼろ令嬢は姉の元婚約者に溺愛される

LanguageJapanese

CountryJapan

ProductionLandQ Studios, Futabasha, NK Animation

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!

WHERE TO WATCH

Crunchyroll

Amazon VideoBUY

Apple TV StoreBUY

Some links may earn us a commission. Data via JustWatch / TMDB

Cast

Rena Motomura

Marie (voice)

Daiki Hamano

Kyros (voice)

Minami Tanaka

Anastasia (voice)

Ryohei Kimura

Louisphon (voice)

Yoko Hikasa

Mio (voice)

Sayaka Ohara

Ryu Ryu (voice)

Tetsuya Kakihara

Toppo (voice)

Tatsuyuki Kobayashi

Thomas (voice)

Yuuka Aisaka

Tunica (voice)

Seasons & Episodes1 season · 12 episodes

0% complete

E1I Could Never Replace My Sister

Jul 5, 202525m

Marie is always dressed in tatters and is treated like a servant in her own home. Then she meets Count Kyros.

E2Marie, I Want to Marry You

Jul 12, 202525m

Kyros hates aristocratic society and its ties of obligation. But why? And what changed when he met Marie?

E3A Life I Saw in a Dream, and a Dream-like Life

Jul 19, 202525m

Marie begins her new life as Kyros' fiancée and finds herself bewildered by the differences from her old life.

E4I've Found the Things I Like

Jul 26, 202525m

Kyros wants to provide Marie with every comfort, but Mio cautions him. Then a package from the baron arrives.

E5The Prince and the Pitch-Black Warrior

Aug 2, 202525m

Luiphon takes Marie to a sword fighting contest. The ferocity of it scares her. Then the dark warrior fights.

E6Am I Enough As I Am?

Aug 9, 202525m

Liu Liu, Kyros' mother, discovers surprising things about Marie. Mio investigates the baron on Kyros' orders.

E7You're So Close, I Think You May Make Me Dizzy

Aug 16, 202525m

Mio investigates a comment in a letter from Marie's brother. Marie and Kyros go to the capital for a date.

E8A Gift More Lovely Than Jewels

Aug 23, 202525m

Kyros and Marie meet Luiphon at a jeweler's at his request. Thoughts of Anastasia haunt Marie's happiness.

E9In Pursuit of Anastasia's Spirit

Aug 30, 202525m

Kyros demands the truth of Anastasia's accident, but he and Marie are not prepared for the answers they find.

E10Please Call Off the Betrothal

Sep 6, 202525m

Worried, Kyros arranges to meet with Norman. But as Marie hears him describe his apprentice, her fears grow.

E11The Empty Princess Lives

Sep 13, 202525m

Marie's attacker talks about the past. Why did little Marie's life change so much? Why was she left in rags?

E12It's Time to Settle This

Sep 20, 202525m

Marie is determined to settle things. But even with everyone's help, how will she confront her parents?

About Betrothed to My Sister's Ex

Betrothed to My Sister's Ex is an animation, comedy, drama series on MBS. The show first aired on Jul 5, 2025 and currently has 1 season and 12 episodes. Betrothed to My Sister's Ex has ended. It has a rating of 8.0/10 based on 32 votes. The cast includes Rena Motomura, Daiki Hamano, Minami Tanaka, Ryohei Kimura, Yoko Hikasa.