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Betrothed to My Sister's Ex
RELEASED·SERIES·JA

Betrothed to My Sister's Ex

Sat, Jul 5, 2025
  • Animation
  • Comedy
  • Drama
Series · Synopsis

Synopsis

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!

Trailer

Watch the trailer

Where to watch

Streaming on

  • Crunchyroll↗
  • Crunchyroll Amazon Channel↗
Cast

Top of the call sheet

  • Rena Motomura
    Rena Motomura
    as Marie (voice)
  • Daiki Hamano
    Daiki Hamano
    as Kyros (voice)
  • Minami Tanaka
    Minami Tanaka
    as Anastasia (voice)
  • Ryohei Kimura
    Ryohei Kimura
    as Louisphon (voice)
  • Yoko Hikasa
    Yoko Hikasa
    as Mio (voice)
  • Sayaka Ohara
    Sayaka Ohara
    as Ryu Ryu (voice)
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Episodes

1 season · 12 episodes

Running · 12 aired
Season 1
12 episodes · 12 aired
▾
  • E1
    I Could Never Replace My Sister
    Aired · Fri, Jul 4, 2025 · 30m

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

  • E2
    Marie, I Want to Marry You
    Aired · Fri, Jul 11, 2025 · 30m

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

  • E3
    A Life I Saw in a Dream, and a Dream-like Life
    Aired · Fri, Jul 18, 2025 · 30m

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

  • E4
    I've Found the Things I Like
    Aired · Fri, Jul 25, 2025 · 30m
  • E5
    The Prince and the Pitch-Black Warrior
    Aired · Fri, Aug 1, 2025 · 30m

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

  • E6
    Am I Enough As I Am?
    Aired · Fri, Aug 8, 2025 · 30m

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

  • E7
    You're So Close, I Think You May Make Me Dizzy
    Aired · Fri, Aug 15, 2025 · 30m

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

  • E8
    A Gift More Lovely Than Jewels
    Aired · Fri, Aug 22, 2025 · 30m

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

  • E9
    In Pursuit of Anastasia's Spirit
    Aired · Fri, Aug 29, 2025 · 30m

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

  • E10
    Please Call Off the Betrothal
    Aired · Fri, Sep 5, 2025 · 30m
  • E11
    The Empty Princess Lives
    Aired · Fri, Sep 12, 2025 · 30m
  • E12
    It's Time to Settle This
    Aired · Fri, Sep 19, 2025 · 30m