As of July 2026, Oreimo Season 1 aired in 2010 with 12 episodes — streaming now on Crunchyroll. Full episode guide and where to watch below.
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Oreimo Season 1

2010 12 Episodes Animation · Comedy ⭐ 7/10

Right now you can watch Oreimo Season 1 on and — and it is funnier than its reputation suggests. A compact run that never overstays its welcome. Its 7/10 TMDB score, built from 152 ratings, reflects a title that consistently delivers. Watch it for Yuichi Nakamura — stay for everyone else around them. Available now — press play and find out why people keep recommending it.

Part of the current wave of titles people are actually watching, Oreimo Season 1 earns its spot. Sharp writing and a well-matched ensemble are what separate Oreimo Season 1 from the crowd. Living in the shadow of his talented younger sister, Kyousuke Kosaka conducts a normal lifestyle until he accidentally finds out that she hides a secret. In addition to being smart, pretty, and popular; Kirino Kosaka is also an obsessive consumer of anime and eroge (adult computer games). What will Kyousuke do? Yuichi Nakamura and Ayana Taketatsu lead a cast that brings real weight to the material. It was aired in 2010. The real test of any comedy is whether it is still funny once you know all the jokes, and Oreimo Season 1 holds up on rewatch in a way that separates it from one-off curiosities. It delivers reliably on what it promises, which is more than most of its competition manages.

Comedy fans looking for a reliably funny watch will find it in Oreimo Season 1. It rewards viewers regardless of what else is in their watch history. Best experienced as a single, sustained watch if your schedule allows. Yuichi Nakamura sets the tone, but the supporting cast is where a lot of the best moments come from. A reliable pick for any night you want quality comedy without the homework.

📡 Where to Watch Oreimo Season 1

🇦🇺 Australia
🇺🇸 United States
🇬🇧 United Kingdom
🇨🇦 Canada
🇳🇿 New Zealand
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🎬 Oreimo Season 1 — Episode Guide

E1
My Little Sister Can't Be My Love
2010-10-03
For years, ordinary high-schooler Kousaka Kyousuke has had an icy relationship with his younger sister Kirino, a star athlete who is also a star student.
E2
My Little Sister Can't Bring Me to an IRL Meet
2010-10-10
While being grilled by Kirino over why he hasn't made any progress in the game she ordered him to complete, it occurs to Kyousuke that she needs some friends that she can talk to without concealing her otaku interests.
E3
My Little Sister Can't Be This Cute
2010-10-17
Kirino finds her first otaku friends at the IRL meet: "Kuroneko" and "Saori Bajeena." They spend their days deep in discussions over their otaku interests. Seeing Kirino this way puts Kyousuke's mind at ease.
E4
My Little Sister Can't Be Going to Summerket
2010-10-24
One day, Kirino's non-otaku, "public" friends—Aragaki Ayase and Kurusu Nanako—come over to visit. Kyousuke is harshly told by Kirino to not let her friends see him.
E5
My Little Sister's Best Friend Can't Be This XX
2010-10-31
On the way home from an enjoyable Summerket. They bump into Aragaki Ayase, Kirino's best friend.
E6
My Childhood Friend Can't Be This Cute
2010-11-07
Kyousuke is asked about his relationship with Manami by his friend, Akagi. Akagi is exasperated when Kyousuke answers that, although they don't have a romantic relationship, he doesn't want her to be taken by anyone else.
E7
My Little Sister Can't Be a Novelist
2010-11-14
Kyousuke comes home one day and is startled to find Kuroneko loitering in the living room by herself.
E8
My Little Sister Can't Be Animated
2010-11-21
Kirino has made her debut as an author. Reader response has been overwhelming, and her editor has even better news to report.
E9
My Little Sister Can't Be This Absorbed Into Eroge
2010-11-28
Kirino has been acting strangely antsy for the past few days. The reason is that the little sister game she ordered hasn't arrived yet.
E10
My Little Sister Can't Be Cosplaying Like This
2010-12-05
One day, Ayase calls Kyousuke out of the blue and asks him to see her. She wants to get Kirino a present, and wants him to think of what she would be happiest to get.
E11
My Little Sister Can't Be This Maid
2010-12-12
Sent out to buy groceries by his mother, Kyousuke bumps into Manami at the supermarket. They get to talking, and they eventually arrange for Manami to come visit for the first time in ages.
E12
My Little Sister's Advice Can't End Here (GOOD END)
2010-12-19
Ever since the events of the previous episode, Kyousuke has been nervous about his improved relationship with his sister.

🎭 Cast of Oreimo Season 1

Yuichi Nakamura
Yuichi Nakamura
Kyousuke Kousaka (voice)
Ayana Taketatsu
Ayana Taketatsu
高坂桐乃(配音)

📋 All Seasons of Oreimo

Season 2

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