Betrothed to My Sister's Ex (2025)
A 2025 Japanese romance anime following an overlooked baron's daughter whose fate is transformed when she ends up marrying the count meant for her sister.
Betrothed to My Sister's Ex - Series Information
- Original Title: ずたぼろ令嬢は姉の元婚約者に溺愛される
- First Air Year: 2025
- Last Air Year: 2025
- Type: TV Series
- Genres: Animation, Comedy, Drama
- Content Rating (US): TV-14
- Number of Seasons: 1
- Number of Episodes: 12
- Status: Ended
- Original Language: Japanese
- Spoken Languages: Japanese
- First Air Date: July 5, 2025 (United States - TV-14), July 5, 2025 (France - 12), July 5, 2025 (Australia - PG), July 5, 2025 (Brazil - 10), July 5, 2025 (Spain - 10)
- Networks: MBS, TBS, CBC
- Production Companies: LandQ Studios, Futabasha, NK Animation, MBS, Pierrot, Starry Cube, Bit grooove promotion
- Production Countries: Japan
- Alternative Titles: 破烂千金被姐姐的原婚约者溺爱着 (CN), Zutaboro Reijō wa Ane no Moto Konyakusha ni Dekiai Sareru (JP), Loved by Her Sister's Former Fiancé (US)
Betrothed to My Sister's Ex - Plot
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!
Betrothed to My Sister's Ex - Trailer
Watch the official trailer and see how Marie's unexpected story begins:
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Betrothed to My Sister's Ex - Cast & Crew
Main Cast
- Rena Motomura
- Daiki Hamano
- Minami Tanaka
- Ryohei Kimura
- Yoko Hikasa
- Sayaka Ohara
- Tetsuya Kakihara
- Tatsuyuki Kobayashi
- Yuuka Aisaka
Writers
- Kenta Ihara
Betrothed to My Sister's Ex - FAQs
Is Betrothed to My Sister's Ex based on a light novel?
Yes, the anime is adapted from a Japanese light novel series. The source material follows the same story of Marie, the overlooked second daughter who unexpectedly becomes betrothed to a powerful count. The adaptation was handled by studio Pierrot and aired in summer 2025.
What is Betrothed to My Sister's Ex about?
Marie is the neglected second daughter of an impoverished baron's family, treated more like a servant than a noble. When Count Kyuros Granado meets her and falls for her instantly, a misunderstanding leads him to propose to her glamorous elder sister Anastasia instead — until a tragic accident reshuffles their destinies entirely.
Where can you stream Betrothed to My Sister's Ex?
The series streams on Crunchyroll, including via the Crunchyroll Amazon Channel. If you prefer to own it, individual episodes and seasons are available to purchase on Amazon Video and Apple TV Store.
Who voices Marie in Betrothed to My Sister's Ex?
Marie is voiced by Rena Motomura, while Daiki Hamano brings Count Kyros to life. Minami Tanaka voices the elder sister Anastasia, and Ryohei Kimura plays Louisphon. The cast also includes notable names like Yoko Hikasa, Sayaka Ohara, and Tetsuya Kakihara.
How many episodes does Betrothed to My Sister's Ex have?
The series ran for a single season of 12 episodes, which concluded in 2025. The compact episode count keeps the romantic storyline focused and briskly paced, making it an easy binge for fans of josei romance anime.
Is Betrothed to My Sister's Ex worth watching for romance anime fans?
If you enjoy underdog romance stories with a dash of noble-society drama, this one delivers. Marie's journey from overlooked servant-daughter to a count's cherished bride is genuinely heartwarming, and the misunderstanding-driven premise adds just enough tension to keep each episode engaging.
What genre is Betrothed to My Sister's Ex?
The series blends animation, comedy, and drama, sitting firmly within the josei romance anime tradition. It combines lighthearted comedic moments with emotionally resonant drama, making it accessible to both casual anime viewers and dedicated fans of the romance genre.
What anime are similar to Betrothed to My Sister's Ex?
Fans of this series will likely enjoy Nina the Starry Bride, Bibliophile Princess, and 7th Time Loop: The Villainess Enjoys a Carefree Life Married to Her Worst Enemy! — all of which share the same blend of romantic tension, noble-society settings, and endearing female leads navigating unexpected circumstances.
More About Betrothed to My Sister's Ex
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