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My Friend's Little Sister Has It In for Me!
RELEASED·SERIES·JA

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

Sat, Oct 4, 2025
  • Animation
  • Comedy
Series · Synopsis

Synopsis

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?!

Trailer

Watch the trailer

Where to watch

Streaming on

  • Crunchyroll↗
  • Crunchyroll Amazon Channel↗
Cast

Top of the call sheet

  • Haruki Ishiya
    Haruki Ishiya
    as Akiteru Oboshi (voice)
  • Sayumi Suzushiro
    Sayumi Suzushiro
    as Iroha Kohinata (voice)
  • Tomori Kusunoki
    Tomori Kusunoki
    as Mashiro Tsukinomori (voice)
  • Soma Saito
    Soma Saito
    as Ozuma Kohinata (voice)
  • Kana Hanazawa
    Kana Hanazawa
    as Sumire Kageishi (voice)
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Episodes

1 season · 12 episodes

To Be Determined · 12 aired
Season 1
12 episodes · 12 aired
▾
  • E1
    My Friend's Little Sister Has It In for Me
    Aired · Sat, Oct 4, 2025 · 30m

    Akiteru just wants to work toward his future, but his friend's little sister won't allow him any peace.

  • E2
    The Cousin I Haven't Seen in Years Is Cold to Me
    Aired · Sat, Oct 11, 2025 · 30m

    Now that Mashiro has moved to his school, can Akiteru manage to make her open up to him?

  • E3
    Only I Can Be a Pain to My Uncle's Daughter
    Aired · Sat, Oct 18, 2025 · 30m

    Akiteru decides to throw a welcome party for Mashiro, but first he must convince her to attend.

  • E4
    My Friend's Little Sister Might Be a Delinquent
    Aired · Sat, Oct 25, 2025 · 30m

    Akiteru and Iroha recall how they first met.

  • E5
    My Friend's Little Sister Keeps Getting Close to Me
    Aired · Sat, Nov 1, 2025 · 30m

    A look back at how Iroha came to be the voice actress for 05th Floor Alliance.

  • E6
    My Friend's Little Sister Has It In for My Friend's Enemy
    Aired · Sat, Nov 8, 2025 · 30m

    While at the mall with Mashiro and Iroha, Akiteru learns why Mashiro left her old school.

  • E7
    The Girl Who Confessed to Me Is Cold to Me in Reality
    Aired · Sat, Nov 15, 2025 · 30m

    Akiteru tries to give a proper reply to Mashiro's love confession, but she's brutally cold to him in person.

  • E8
    Everyone I Know Is Being Weird With Me
    Aired · Sat, Nov 22, 2025 · 30m

    Sumire asks Akiteru for help with a problem that could endanger her future with 05th Floor Alliance.

  • E9
    My Fake Girlfriend Gets Tough When I Respond To Her Confession
    Aired · Sat, Nov 29, 2025 · 30m
  • E10
    My Friend's Little Sister Only Gets an Apology from Me
    Aired · Sat, Dec 6, 2025 · 30m

    Akiteru must clear the air with Iroha to keep 05th Floor Alliance running smoothly.

  • E11
    We're Perfect for Training the Drama Club
    Aired · Sat, Dec 13, 2025 · 30m

    With 05th Floor Alliance's help, the drama club is ready for the big competition... but then disaster strikes.

  • E12
    My Friend's Little Sister Really Does Have It In for Me
    Aired · Sat, Dec 20, 2025 · 30m

    Can Akiteru save the drama club and secure 05th Floor Alliance's future?