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

TV·2025–2025·1 season, 12 episodes·HTB·Animation, Comedy·23m·NEW

Streaming on (US) CrunchyrollSee all

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?!

Highest-rated episodes all ranked

  1. 01My Friend's Little Sister Has It In for Me! S01E03Only I Can Be a Pain to My Uncle’s DaughterS01E03 · 10.0Akiteru decides to throw a welcome party for Mashiro, but first he must convince her to attend.
  2. 02My Friend's Little Sister Has It In for Me! S01E04My Friend's Little Sister Might Be a DelinquentS01E04 · 10.0Akiteru and Iroha recall how they first met.
  3. 03My Friend's Little Sister Has It In for Me! S01E06My Friend's Little Sister Has It In for My Friend's EnemyS01E06 · 10.0While at the mall with Mashiro and Iroha, Akiteru learns why Mashiro left her old school.

Cast

Haruki IshiyaHaruki IshiyaAkiteru Oboshi (voice)Sayumi SuzushiroSayumi SuzushiroIroha Kohinata (voice)Tomori KusunokiTomori KusunokiMashiro Tsukinomori (voice)Soma SaitoSoma SaitoOzuma Kohinata (voice)Kana HanazawaKana HanazawaSumire Kageishi (voice)

Episodes by season

Season01Episode ratings across the season — the gold bar is its best episode12Episodes2025Aired 9.8Season avg
  1. S01E01My Friend's Little Sister Has It In for Me! S01E01My Friend's Little Sister Has It In for MeOctober 4, 2025 9.0Akiteru just wants to work toward his future, but his friend's little sister won't allow him any peace.
  2. S01E02My Friend's Little Sister Has It In for Me! S01E02The Cousin I Haven't Seen in Years Is Cold to MeOctober 11, 2025 9.0Now that Mashiro has moved to his school, can Akiteru manage to make her open up to him?
  3. S01E03My Friend's Little Sister Has It In for Me! S01E03Season's bestOnly I Can Be a Pain to My Uncle’s DaughterOctober 18, 2025 10.0Akiteru decides to throw a welcome party for Mashiro, but first he must convince her to attend.
  4. S01E04My Friend's Little Sister Has It In for Me! S01E04My Friend's Little Sister Might Be a DelinquentOctober 25, 2025 10.0Akiteru and Iroha recall how they first met.
  5. S01E05My Friend's Little Sister Has It In for Me! S01E05My Friend's Little Sister Keeps Getting Close to MeNovember 1, 2025 9.0A look back at how Iroha came to be the voice actress for 05th Floor Alliance.
  6. S01E06My Friend's Little Sister Has It In for Me! S01E06My Friend's Little Sister Has It In for My Friend's EnemyNovember 8, 2025 10.0While at the mall with Mashiro and Iroha, Akiteru learns why Mashiro left her old school.
  7. S01E07My Friend's Little Sister Has It In for Me! S01E07The Girl Who Confessed to Me Is Cold to Me in RealityNovember 15, 2025 10.0Akiteru tries to give a proper reply to Mashiro's love confession, but she's brutally cold to him in person.
  8. S01E08My Friend's Little Sister Has It In for Me! S01E08Everyone I Know Is Being Weird With MeNovember 22, 2025 10.0Sumire asks Akiteru for help with a problem that could endanger her future with 05th Floor Alliance.
  9. S01E09My Friend's Little Sister Has It In for Me! S01E09My Fake Girlfriend Gets Tough When I Respond To Her ConfessionNovember 29, 2025 10.0Akiteru and Iroha head to Otoi's studio to record for the game, but Iroha has ideas of her own.
  10. S01E10My Friend's Little Sister Has It In for Me! S01E10My Friend's Little Sister Only Gets an Apology from MeDecember 6, 2025 10.0Akiteru must clear the air with Iroha to keep 05th Floor Alliance running smoothly.
  11. S01E11My Friend's Little Sister Has It In for Me! S01E11We're Perfect for Training the Drama ClubDecember 13, 2025 10.0With 05th Floor Alliance's help, the drama club is ready for the big competition... but then disaster strikes.
  12. S01E12My Friend's Little Sister Has It In for Me! S01E12My Friend's Little Sister Really Does Have It In for MeDecember 20, 2025 10.0Can Akiteru save the drama club and secure 05th Floor Alliance's future?

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