Betrothed to My Sister’s Ex Anime Announces Release Date, Theme Song Artists, and New Cast Members in New Promo Video
The official website of the anime adaptation of Tobirano and Murasaki Mai‘s Betrothed to My Sister’s Ex light novel series has released a new promotional video and short commercial, showcasing a July 4, 2025, release date.
The video also features the opening theme, “Gesshoku”, by krage. The ending theme song will be “Marie” by Myuk.
The site also unveiled a new key visual.
Finally, the site announced four new cast members and shared their characters’ visuals.
New Cast Members:
- Tanaka Minami as Anastasia
- Kimura Ryouhei as Louisphon
- Hikasa Youko as Mio
- Ohara Sayaka as Liu-Liu
Publisher Futabasha released the first volume of the light novel on April 15, 2020. The latest volume, volume 8, was released on January 10, 2025. Volumes 3-8 were all published digitally only.
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About Betrothed to My Sister's Ex
Marie, the second daughter of a poor baron, wears tattered clothes and is treated like a servant by her parents.
But she is still honest, kind, and devoted to her family.
One day, a birthday party is held for Marie.
However, the star of the party is her princess-like older sister, Anastasia. During the party, Marie happens to bump into the wealthy Count Cyrus.
They are attracted to each other, and Cyrus falls in love with Marie at first sight, but due to a misunderstanding, he proposes to Anastasia instead of Marie!
Cyrus and Anastasia's engagement progresses rapidly.
However, Anastasia dies in an accident, and Marie ends up marrying into the Count's family instead.
The Cinderella story of the "ragged young lady" that started with a misunderstanding begins!
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