My Friend's Little Sister Has It In for Me!
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My Friend's Little Sister Has It In for Me!

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For high schooler Akiteru Oboshi, the whole youthful experience thing-like fun, friendships, and even having a girlfriend-is a complete waste of time. So when his best friend's sister, Iroha Kohinata, keeps teasing him, Akiteru naturally finds it annoying. She practically lives in his room, she's always on his bed, she's just a raging storm of clinginess! Why is she only annoying around him?!
2025
AnimeRomanceHumorous
AnimeRomanceHumorous
2025
Cast: Haruki IshiyaSayumi SuzushiroTomori Kusunoki
13+
Season 1
12 episodes

  • 1. My Friend's Little Sister Has It In for Me

    1. My Friend's Little Sister Has It In for Me

    Akiteru just wants to work toward his future, but his friend's little sister won't allow him any peace.
    Akiteru just wants to work toward his future, but his friend's little sister won't allow him any peace.
    13+
    24min
    Oct 3, 2025
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  • 2. The Cousin I Haven't Seen in Years Is Cold to Me

    2. The Cousin I Haven't Seen in Years Is Cold to Me

    Now that Mashiro has moved to his school, can Akiteru manage to make her open up to him?
    Now that Mashiro has moved to his school, can Akiteru manage to make her open up to him?
    13+
    24min
    Oct 10, 2025
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  • 3. Only I Can Be a Pain to My Uncle's Daughter

    3. Only I Can Be a Pain to My Uncle's Daughter

    Akiteru decides to throw a welcome party for Mashiro, but first he must convince her to attend.
    Akiteru decides to throw a welcome party for Mashiro, but first he must convince her to attend.
    13+
    24min
    Oct 17, 2025
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  • 4. My Friend's Little Sister Might Be a Delinquent

    4. My Friend's Little Sister Might Be a Delinquent

    Akiteru and Iroha recall how they first met.
    Akiteru and Iroha recall how they first met.
    13+
    24min
    Oct 24, 2025
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  • 5. My Friend's Little Sister Keeps Getting Close to Me

    5. My Friend's Little Sister Keeps Getting Close to Me

    A look back at how Iroha came to be the voice actress for 05th Floor Alliance.
    A look back at how Iroha came to be the voice actress for 05th Floor Alliance.
    13+
    24min
    Oct 31, 2025
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  • 6. My Friend's Little Sister Has It In for My Friend's Enemy

    6. My Friend's Little Sister Has It In for My Friend's Enemy

    While at the mall with Mashiro and Iroha, Akiteru learns why Mashiro left her old school.
    While at the mall with Mashiro and Iroha, Akiteru learns why Mashiro left her old school.
    13+
    24min
    Nov 7, 2025
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  • 7. The Girl Who Confessed to Me Is Cold to Me in Reality

    7. The Girl Who Confessed to Me Is Cold to Me in Reality

    Akiteru tries to give a proper reply to Mashiro's love confession, but she's brutally cold to him in person.
    Akiteru tries to give a proper reply to Mashiro's love confession, but she's brutally cold to him in person.
    13+
    24min
    Nov 14, 2025
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  • 8. Everyone I Know Is Being Weird With Me

    8. Everyone I Know Is Being Weird With Me

    Sumire asks Akiteru for help with a problem that could endanger her future with 05th Floor Alliance.
    Sumire asks Akiteru for help with a problem that could endanger her future with 05th Floor Alliance.
    13+
    24min
    Nov 21, 2025
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  • 9. My Fake Girlfriend Gets Tough When I Respond to Her Confession

    9. My Fake Girlfriend Gets Tough When I Respond to Her Confession

    Akiteru and Iroha head to Otoi's studio to record for the game, but Iroha has ideas of her own.
    Akiteru and Iroha head to Otoi's studio to record for the game, but Iroha has ideas of her own.
    13+
    24min
    Nov 28, 2025
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  • 10. My Friend's Little Sister Only Gets an Apology from Me

    10. My Friend's Little Sister Only Gets an Apology from Me

    Akiteru must clear the air with Iroha to keep 05th Floor Alliance running smoothly.
    Akiteru must clear the air with Iroha to keep 05th Floor Alliance running smoothly.
    13+
    24min
    Dec 5, 2025
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  • 11. We're Perfect for Training the Drama Club

    11. We're Perfect for Training the Drama Club

    With 05th Floor Alliance's help, the drama club is ready for the big competition... but then disaster strikes.
    With 05th Floor Alliance's help, the drama club is ready for the big competition... but then disaster strikes.
    13+
    24min
    Dec 12, 2025
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  • 12. My Friend's Little Sister Really Does Have It In for Me

    12. My Friend's Little Sister Really Does Have It In for Me

    Can Akiteru save the drama club and secure 05th Floor Alliance's future?
    Can Akiteru save the drama club and secure 05th Floor Alliance's future?
    13+
    24min
    Dec 19, 2025
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    • My Friend's Little Sister Has It In for Me!
    AnimeRomanceHumorous
    2025
    For high schooler Akiteru Oboshi, the whole youthful experience thing-like fun, friendships, and even having a girlfriend-is a complete waste of time. So when his best friend's sister, Iroha Kohinata, keeps teasing him, Akiteru naturally finds it annoying. She practically lives in his room, she's always on his bed, she's just a raging storm of clinginess! Why is she only annoying around him?!
    Creators and Cast
    Cast
    Haruki IshiyaSayumi SuzushiroTomori KusunokiSoma Saito
    Studio
    BLADE
    Reviews
    3.7 out of 5 stars

    3 global ratings

    1. 5 star
      57%
    2. 4 star
      0%
    3. 3 star
      0%
    4. 2 star
      43%
    5. 1 star
      0%
    Read all reviews
    Content advisory
    13+
    foul languageFlashing lights and strobing patterns might affect photosensitive viewers
    Audio languages
    日本語
    Subtitles
    EnglishالعربيةDeutschEspañol (Latinoamérica)Español (España)FrançaisIndonesiaItalianoMelayuPortuguês (Brasil)РусскийไทยTiếng Việt中文（简体）中文（繁體）
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