Betrothed to My Sister's Ex

Betrothed to My Sister's Ex

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!

Genre: AnimationComedyDrama

Cast:Rena MotomuraDaiki HamanoMinami TanakaRyohei KimuraYoko HikasaSayaka OharaTetsuya KakiharaTatsuyuki KobayashiYuuka Aisaka


1Season 1

Betrothed to My Sister's Ex: Season 1 (2025): Episode 1 - I Could Never Replace My Sister

July 5, 2025

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

2Season 1

Betrothed to My Sister's Ex: Season 1 (2025): Episode 2 - Marie, I Want to Marry You

July 12, 2025

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

3Season 1

Betrothed to My Sister's Ex: Season 1 (2025): Episode 3 - A Life I Saw in a Dream, and a Dream-like Life

July 19, 2025

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

4Season 1

Betrothed to My Sister's Ex: Season 1 (2025): Episode 4 - I've Found the Things I Like

July 26, 2025

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

5Season 1

Betrothed to My Sister's Ex: Season 1 (2025): Episode 5 - The Prince and the Pitch-Black Warrior

August 2, 2025

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

6Season 1

Betrothed to My Sister's Ex: Season 1 (2025): Episode 6 - Am I Enough As I Am?

August 9, 2025

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

7Season 1

Betrothed to My Sister's Ex: Season 1 (2025): Episode 7 - You're So Close, I Think You May Make Me Dizzy

August 16, 2025

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

8Season 1

Betrothed to My Sister's Ex: Season 1 (2025): Episode 8 - A Gift More Lovely Than Jewels

August 23, 2025

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

9Season 1

Betrothed to My Sister's Ex: Season 1 (2025): Episode 9 - In Pursuit of Anastasia's Spirit

August 30, 2025

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

10Season 1

Betrothed to My Sister's Ex: Season 1 (2025): Episode 10 - Please Call Off the Betrothal

September 6, 2025

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

11Season 1

Betrothed to My Sister's Ex: Season 1 (2025): Episode 11 - The Empty Princess Lives

September 13, 2025

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

12Season 1

Betrothed to My Sister's Ex: Season 1 (2025): Episode 12 - It's Time to Settle This

September 20, 2025

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