My Friend's Little Sister Has It In for Me! — Season 1
About this season
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 (12)
1. My Friend's Little Sister Has It In for Me
9.0Aired 4 October 2025 • 24 min
Akiteru 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 Me
9.0Aired 11 October 2025 • 24 min
Now 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 Daughter
10.0Aired 18 October 2025 • 24 min
Akiteru 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 Delinquent
10.0Aired 25 October 2025 • 24 min
Akiteru and Iroha recall how they first met.
5. My Friend's Little Sister Keeps Getting Close to Me
9.0Aired 1 November 2025 • 24 min
A 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 Enemy
10.0Aired 8 November 2025 • 24 min
While 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 Reality
10.0Aired 15 November 2025 • 24 min
Akiteru 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 Me
10.0Aired 22 November 2025 • 24 min
Sumire 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 Confession
10.0Aired 29 November 2025 • 24 min
Akiteru 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 Me
10.0Aired 6 December 2025 • 24 min
Akiteru must clear the air with Iroha to keep 05th Floor Alliance running smoothly.
11. We're Perfect for Training the Drama Club
10.0Aired 13 December 2025 • 24 min
With 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 Me
10.0Aired 20 December 2025 • 24 min
Can Akiteru save the drama club and secure 05th Floor Alliance's future?