Haruki Ishiya
Akiteru Oboshi (voice)
Series
Watch My Friend's Little Sister Has It In for Me! (2025) Online
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?!
Episodes
Season 1
PreviousNext
1. My Friend's Little Sister Has It In for MeNow viewing2025-10-0424m8.0Akiteru just wants to work toward his future, but his friend's little sister won't allow him any peace.
2. The Cousin I Haven't Seen in Years Is Cold to Me2025-10-1124m8.2Now that Mashiro has moved to his school, can Akiteru manage to make her open up to him?
3. Only I Can Be a Pain to My Uncle’s Daughter2025-10-1824m8.0Akiteru decides to throw a welcome party for Mashiro, but first he must convince her to attend.
4. My Friend's Little Sister Might Be a Delinquent2025-10-2524m8.3Akiteru and Iroha recall how they first met.
5. My Friend's Little Sister Keeps Getting Close to Me2025-11-0124m7.8A look back at how Iroha came to be the voice actress for 05th Floor Alliance.
6. My Friend's Little Sister Has It In for My Friend's Enemy2025-11-0824m8.5While at the mall with Mashiro and Iroha, Akiteru learns why Mashiro left her old school.
7. The Girl Who Confessed to Me Is Cold to Me in Reality2025-11-1524m8.3Akiteru tries to give a proper reply to Mashiro's love confession, but she's brutally cold to him in person.
8. Everyone I Know Is Being Weird With Me2025-11-2224m8.3Sumire asks Akiteru for help with a problem that could endanger her future with 05th Floor Alliance.
9. My Fake Girlfriend Gets Tough When I Respond To Her Confession2025-11-2924m8.3Akiteru and Iroha head to Otoi's studio to record for the game, but Iroha has ideas of her own.
10. My Friend's Little Sister Only Gets an Apology from Me2025-12-0624m8.3Akiteru must clear the air with Iroha to keep 05th Floor Alliance running smoothly.
11. We're Perfect for Training the Drama Club2025-12-1324m8.3With 05th Floor Alliance's help, the drama club is ready for the big competition... but then disaster strikes.
12. My Friend's Little Sister Really Does Have It In for Me2025-12-2024m8.3Can Akiteru save the drama club and secure 05th Floor Alliance's future?
Cast
Top Billed Cast
Sayumi Suzushiro
Iroha Kohinata (voice)
Tomori Kusunoki
Mashiro Tsukinomori (voice)
Soma Saito
Ozuma Kohinata (voice)
Kana Hanazawa
Sumire Kageishi (voice)
Availability
Where To Watch Legally
Crunchyroll
Crunchyroll Amazon Channel
Amazon Video
Apple TV StoreStreaming availability data provided by JustWatch.
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FAQ
Frequently Asked Questions
Is My Friend's Little Sister Has It In for Me! available to watch online?
Yes - see the "Where to watch legally" section on this page for streaming, rental and purchase options.
How many seasons does My Friend's Little Sister Has It In for Me! have?
My Friend's Little Sister Has It In for Me! has 1 season and 12 episodes.
When did My Friend's Little Sister Has It In for Me! first air?
My Friend's Little Sister Has It In for Me! first aired in 2025.
Is My Friend's Little Sister Has It In for Me! still running?
My Friend's Little Sister Has It In for Me!'s status on TMDB is: Ended.
What genre is My Friend's Little Sister Has It In for Me!?
My Friend's Little Sister Has It In for Me! is classified as Animation, Comedy.