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Betrothed to My Sister's Ex
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Betrothed to My Sister's Ex
⭐ 6.9 Season 1 Japanese
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Overview
Storyline
Marie thinks that she is being used as a substitute fiancée for her lost sister Anastasia; due to her parents breaking her self-worth. In truth, she was the one the proposal was meant for; the sender had mixed up their names.
Cast & Media Details
Stars Yoko Hikasa, Rena Motomura, Daiki Hamano, Tatsuyuki Kobayashi
Creator Tobirano
Genre Animation, Comedy, Romance
Release Date 05 Jul, 2025
Total Seasons 1 Seasons
Country Japan
Audio / Language Japanese
Production LandQ Studios Co.
IMDb Votes 647
Keywords & Themes
based on light novel anime animation
SEASON (1)
I Could Never Replace My Sister
1. I Could Never Replace My Sister ⭐ 8.1
04 Jul, 2025 · 44 votes
Marie is always dressed in tatters and is treated like a servant in her own home. Then she meets Count Kyros.
Watch Episode 1
 Marie, I Want to Marry You
2. Marie, I Want to Marry You ⭐ 7.8
12 Jul, 2025 · 39 votes
Kyros hates aristocratic society and its ties of obligation. But why? And what changed when he met Marie?
Watch Episode 2
 A Life I Saw in a Dream, and a Dream-like Life
3. A Life I Saw in a Dream, and a Dream-like Life ⭐ 8.1
19 Jul, 2025 · 35 votes
Marie begins her new life as Kyros' fiancée and finds herself bewildered by the differences from her old life.
Watch Episode 3
 I've Found the Things I Like
4. I've Found the Things I Like ⭐ 8.1
26 Jul, 2025 · 33 votes
Kyros wants to provide Marie with every comfort, but Mio cautions him. Then a package from the baron arrives.
Watch Episode 4
 The Prince and the Pitch-Black Warrior
5. The Prince and the Pitch-Black Warrior ⭐ 8.2
02 Aug, 2025 · 29 votes
Luiphon takes Marie to a sword fighting contest. The ferocity of it scares her. Then the dark warrior fights.
Watch Episode 5
 Am I Enough As I Am?
6. Am I Enough As I Am? ⭐ 8.3
08 Aug, 2025 · 30 votes
Liu Liu, Kyros' mother, discovers surprising things about Marie. Mio investigates the baron on Kyros' orders.
Watch Episode 6
 You're So Close, I Think You May Make Me Dizzy
7. You're So Close, I Think You May Make Me Dizzy ⭐ 8.3
16 Aug, 2025 · 32 votes
Mio investigates a comment in a letter from Marie's brother. Marie and Kyros go to the capital for a date.
Watch Episode 7
 A Gift More Lovely Than Jewel's
8. A Gift More Lovely Than Jewel's ⭐ 7.8
23 Aug, 2025 · 32 votes
Kyros and Marie meet Luiphon at a jeweler's at his request. Thoughts of Anastasia haunt Marie's happiness.
Watch Episode 8
 In Pursuit of Anastasia's Spirit
9. In Pursuit of Anastasia's Spirit ⭐ 7.6
30 Aug, 2025 · 31 votes
Kyros demands the truth of Anastasia's accident, but he and Marie are not prepared for the answers they find.
Watch Episode 9
 Please Call Off the Betrothal
10. Please Call Off the Betrothal ⭐ 7.4
06 Sep, 2025 · 32 votes
Worried, Kyros arranges to meet with Norman. But as Marie hears him describe his apprentice, her fears grow.
Watch Episode 10
 The Empty Princess Lives
11. The Empty Princess Lives ⭐ 7.6
13 Sep, 2025 · 26 votes
Marie's attacker talks about the past. Why did little Marie's life change so much? Why was she left in rags?
Watch Episode 11
 It's Time to Settle This
12. It's Time to Settle This ⭐ 8.3
20 Sep, 2025 · 26 votes
Marie is determined to settle things. But even with everyone's help, how will she confront her parents?
Watch Episode 12

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