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My Friend's Little Sister Has It In for Me!
My Friend's Little Sister Has It In for Me!
6.4•2025•U/A 16+•12 Episodes

For high schooler Akiteru Ooboshi, 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?! (Source: Crunchyroll)

Comedy|Romance|Slice of Life
Watch NowAnime

Characters

Iroha Kohinata

Iroha Kohinata

Akiteru Ooboshi

Akiteru Ooboshi

Mashiro Tsukinomori

Mashiro Tsukinomori

Ozuma Kohinata

Ozuma Kohinata

Sumire Kageishi

Sumire Kageishi

Midori Kageishi

Midori Kageishi

Otoi

Otoi

Kanaria Kiraboshi

Kanaria Kiraboshi

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Episodes

  1. 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.

    Play
  2. 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?

    Play
  3. 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.

    Play
  4. 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.

    Play
  5. 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.

    Play
  6. 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.

    Play
  7. 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.

    Play
  8. 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.

    Play
  9. 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.

    Play
  10. 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.

    Play
  11. 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.

    Play
  12. 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?

    Play