The story and preview images for Episode 12 of the TV anime My Friend's Little Sister Has It In for Me! (JP: 友達の妹が俺にだけウザい) have been revealed. This episode will air on Sunday, December 21 at 2:00 AM (JST), and will later be available on various international streaming platforms.

Episode 12 Story

The opening of the National High School Theater Festival is just around the corner.

Determined to showcase the results of all their hard work, Iroha Kohinata and the rest of the theater club members steel themselves for the big stage.

However, an urgent message from Midori Kageishi suddenly changes everything.

Akiteru Oboshi and the others find themselves facing an unexpected crisis.

What fate awaits the theater club, and the "Fifth Floor Alliance" as well?

Introduction

No need for shallow camaraderie, no girlfriend required, and only one true friend is worth having.

That’s how I, Akiteru Ōboshi, live my youth, discarding anything “inefficient.”

And yet, there’s someone who insists on hanging around my room.

Not my sister, not a friend, but an annoyingly clingy underclassman: my best friend’s little sister, Ayaha Kohinata.

“Senpaai, let’s go on a date! …Or did you think I’d say that?”

With the energy of someone who seems to have energy drinks flowing through her veins instead of blood, she invades my bed, teases me with half-hearted seduction, and generally pesters me nonstop. I’m busy every day, but she doesn’t care in the slightest.

Still… why does everyone keep giving me those envious looks?

Apparently, outside of my room, Ayaha is insanely popular, a bright, top-ranked honor student who’s kind, considerate, and the very picture of a pure, elegant girl.

Hey, seriously… if that’s who you really are, then why are you only this annoying to me?

Source : My Friends Little Sister Has It In for Me! Official