Oreimo (2010)

A Japanese anime comedy about a high school boy who discovers his popular model sister secretly lives a passionate double life as an otaku.

Oreimo - Series Information

  • Original Title: 俺の妹がこんなに可愛いわけがない
  • First Air Year: 2010
  • Last Air Year: 2013
  • Type: TV Series
  • Genres: Animation, Comedy
  • Content Rating (US): TV-14
  • Episode Runtime: Average runtime per episode (25 minutes)
  • Number of Seasons: 2
  • Number of Episodes: 25
  • Status: Ended
  • Original Language: Japanese
  • Spoken Languages: Japanese
  • First Air Date: October 3, 2010 (United States - TV-14), October 3, 2010 (Canada - 14+), October 3, 2010 (United Kingdom - 18), October 3, 2010 (Australia - MA 15+), October 3, 2010 (Brazil - 14), October 3, 2010 (Mexico - B-15), October 3, 2010 (South Korea - 15)
  • Networks: Tokyo MX
  • Production Companies: AIC Build, A-1 Pictures
  • Production Countries: Japan
  • Alternative Titles: 我的妹妹哪有这么可爱! (CN), Ore no Imōto ga Konnani Kawaii Wake ga Nai (JP), Ma petite sœur ne peut pas être aussi mignonne (FR), Oreimo (CH), 我的妹妹不可能这么可爱 (HK), Няма как по-малката ми сестра да е такава сладурана (BG), My Sister Can't Be This Cute! (AU)

Oreimo - Plot

Oreimo follows the daily life of an ordinary high school boy named Kyousuke Kousaka. Kyousuke's younger sister Kirino is a pretty fashion model, but also hides a dark secret of being an otaku of adult games. Kyousuke is the only person to whom Kirino reveals her hidden obsession and other issues.

Oreimo - Trailer

Watch the official trailer and get a first look at the series:

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Oreimo - Cast & Crew

Writers

  • Tsukasa Fushimi

Main Cast

  • Yuichi Nakamura
  • Ayana Taketatsu
  • Satomi Sato
  • Saori Hayami
  • Hitomi Nabatame
  • Kana Hanazawa
  • Akeno Watanabe
  • Fumihiko Tachiki
  • Yukari Tamura
  • Junji Majima

Oreimo - FAQs

Where can you stream Oreimo online?

Oreimo is available to stream on Crunchyroll, including through the Crunchyroll Amazon Channel. Both options offer a subscription-based flatrate plan, making it easy to watch the full series across devices wherever Crunchyroll is available.

Is Oreimo based on a light novel?

Oreimo is adapted from the light novel series Ore no Imōto ga Konnani Kawaii Wake ga Nai, written by Tsukasa Fushimi and illustrated by Hiro Kanzaki. The novels were published between 2008 and 2013 under ASCII Media Works' Dengeki Bunko imprint.

Who voices the main characters in Oreimo?

Kyousuke Kousaka is voiced by Yuichi Nakamura, while his sister Kirino is brought to life by Ayana Taketatsu. The supporting cast includes Satomi Sato as Manami, Saori Hayami as Ayase, and Kana Hanazawa as the fan-favourite Ruri Gokou.

How many seasons and episodes does Oreimo have?

Oreimo ran for two main seasons — Season 1 with 12 episodes and Season 2 with 13 episodes — totalling 25 episodes. There is also a Season 0 collection of 38 special episodes, expanding the story well beyond the main broadcast run.

How did Oreimo end, and was the ending controversial?

The finale sparked significant debate among fans. The series concludes with Kyousuke confessing romantic feelings for Kirino, and the two briefly enter a relationship before agreeing to return to a normal sibling dynamic. Many viewers found the ending divisive, feeling it was abrupt and unsatisfying given the build-up across both seasons.

What is Oreimo actually about?

On the surface it is a slice-of-life comedy about a seemingly ordinary high school student, Kyousuke, who discovers his popular model sister Kirino secretly loves otaku culture and adult games. Beneath the comedy lies a story about sibling bonds, identity, and the courage to embrace your passions without shame.

Is Oreimo worth watching for anime fans?

For fans of otaku-culture comedies and slice-of-life anime, Oreimo delivers genuine charm and sharp humour, particularly in its early episodes. The loveable supporting cast — especially Ruri Gokou — is a highlight. The controversial ending divides opinion, but the journey there is entertaining and warmly nostalgic.

What anime series are similar to Oreimo?

If you enjoy Oreimo, you might like Nisekoi for its romantic comedy energy, Uzaki-chan Wants to Hang Out! for its playful sibling-like dynamic, or TONIKAWA: Over the Moon for You for its heartfelt relationship focus. To LOVE-Ru and Koikimo also share a similar blend of comedy and romantic tension.

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