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Ah, high school. Is there any better place to start fresh after a horrible middle school relationship? Nope! Not unless your ex ends up at the same school as you and is now your stepsibling. What was supposed to be a sanctuary of peace where I could avoid ever seeing her again has become a living nightmare! Everywhere I look, I see her—in my house, in my school, in my class. There's no escape! She even claims that she's the older sibling. Like hell she is!

But I won't lose to her. After all, I'm the older brother in this new family situation. That's right, we're family now. No matter how much we may have thought we loved each other before, we saw one another's true colors and realized we weren't meant for each other. That's why even though we may keep up a buddy-buddy sibling act for the sake of our parents, things will never go back to the way they used to be.

Series Cast

  1. Hiro Shimono as Mizuto Irido (voice)

    Hiro Shimono

    Mizuto Irido (voice)

    12 Episodes

  2. Rina Hidaka as Yume Irido (voice)

    Rina Hidaka

    Yume Irido (voice)

    12 Episodes

  3. Ikumi Hasegawa as Akatsuki Minami (voice)

    Ikumi Hasegawa

    Akatsuki Minami (voice)

    12 Episodes

  4. Nobuhiko Okamoto as Kogure Kawanami (voice)

    Nobuhiko Okamoto

    Kogure Kawanami (voice)

    12 Episodes

  5. Miyu Tomita as Isana Higashira (voice)

    Miyu Tomita

    Isana Higashira (voice)

    12 Episodes

  6. Ai Kayano as Yuni Irido (voice)

    Ai Kayano

    Yuni Irido (voice)

    8 Episodes

  7. Kazuyuki Okitsu as Mineaki Irido (voice)

    Kazuyuki Okitsu

    Mineaki Irido (voice)

    7 Episodes

  8. Tasuku Kaito as Male Student (voice) and Male Student A (voice)

    Tasuku Kaito

    Male Student (voice), Male Student A (voice)

    2 Episodes

  9. Akari Tadano as Receptionist (voice) and Background (voice)

    Akari Tadano

    Receptionist (voice), Background (voice)

    2 Episodes

  10. View More

Full Cast & Crew

Last Season

Season 1

2022 • 12 Episodes

Season 1 of My Stepmom's Daughter Is My Ex premiered on July 6, 2022.

I Bestow Unto You My First Kiss

(1x12, September 21, 2022) Season Finale

View All Seasons

My Stepmom's Daughter Is My Ex
My Stepmom's Daughter Is My Ex


Original Name 継母の連れ子が元カノだった

Status Ended


  • See more TV shows from AT-X...

Type Scripted

Original Language Japanese


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  • Created by credit

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