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Season guide

Oreimo: Season 1

12 episodes Premiered Oct 3, 2010 Updated Jul 24, 2026

Oreimo is an animated comedy series that premiered in 2010. The story centers on the daily life of Kyousuke Kousaka, a high school student who lives in the shadow of his younger sister, Kirino Kousaka. While Kyousuke leads an ordinary lifestyle, he eventually discovers that his sister harbors a significant secret. Although Kirino is known for being smart, pretty, and popular, she is also an obsessive consumer of anim

Season overview

Oreimo is an animated comedy series that premiered in 2010. The story centers on the daily life of Kyousuke Kousaka, a high school student who lives in the shadow of his younger sister, Kirino Kousaka. While Kyousuke leads an ordinary lifestyle, he eventually discovers that his sister harbors a significant secret. Although Kirino is known for being smart, pretty, and popular, she is also an obsessive consumer of anime and eroge, which are adult computer games. This revelation forces Kyousuke to navigate the complexities of their already rocky relationship. The narrative explores how this newfound knowledge impacts their sibling dynamic and questions whether the secret will ultimately tear them apart or bring them closer together. The series focuses on the interpersonal conflict and the shifting connection between the two siblings as they manage the contrast between their public lives and Kirino's private interests. The show is categorized under the animation and comedy genres.

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Season 1 Episodes

Episode Guide

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Season 1 Progress Shield

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Binge Efficiency Engine

Season 1: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

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Mytharc (3): Crucial lore & season climaxes
Core (9): Character development & subplots
Side Quest (0): Standalone / filler
S1·E1 Mytharc

My Little Sister Can't Be My Love

Oct 3, 2010 · 25 min

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.

S1·E2 Core

My Little Sister Can't Bring Me to an IRL Meet

Oct 10, 2010 · 25 min

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 w

S1·E3 Core

My Little Sister Can't Be This Cute

Oct 17, 2010 · 25 min

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 p

S1·E4 Core

My Little Sister Can't Be Going to Summerket

Oct 24, 2010 · 25 min

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.

S1·E6 Core

My Childhood Friend Can't Be This Cute

Nov 7, 2010 · 25 min

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 doe

S1·E8 Core

My Little Sister Can't Be Animated

Nov 21, 2010 · 25 min

Kirino has made her debut as an author. Reader response has been overwhelming, and her editor has even better news to report.

S1·E10 Core

My Little Sister Can't Be Cosplaying Like This

Dec 5, 2010 · 25 min

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.

S1·E11 Mytharc

My Little Sister Can't Be This Maid

Dec 12, 2010 · 25 min

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

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