Ore no Imōto ga Konna ni Kawaii Wake ga Nai

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The Ore no Imōto ga Konna ni Kawaii Wake ga Nai series is also available in the following languages:

(Note: Translation progress varies for each version.)

Ore no Imōto ga Konna ni Kawaii Wake ga Nai (俺の妹がこんなに可愛いわけがない, My Little Sister Can't Be This Cute) is a Japanese light novel series written by Tsukasa Fushimi, with illustrations by Hiro Kanzaki.

Story Synopsis

17-year old high school student Kousaka Kyousuke was at a cold-war with his little sister Kirino. They seldom talked and never had a proper conversation these past years. One day, Kyousuke accidentally finds a DVD case of a childish anime program titled "Stardust Witch Meruru." What surprised him more was the fact that inside the case was an R-18 Ero-game CD ROM. Things looked bad since the obvious suspect for having pornographic material such as that was HIM. (He did have some, but they were all magazines.) He didn't want to think what would happen if his mom or his scary father found out about that. Later, he learned that his little sister owned the DVD case (AND the CD ROM inside). She confessed to him that she liked, er, loved Imouto characters with great passion, enough that she'd bought tons of Imouto Ero-games and other Imouto-related items. To put it simply, he learned that she was an Imouto-only Otaku. Kyousuke had hard time believing that a "typical girl nowadays" such as his sister would turn out to be an Otaku. Now, Kirino wants Kyousuke to have a "life consultation" with her, which put an end to the peaceful life that Kyousuke was having.

You can tell us what you think of the series by polling here and discussing it here.


  • 4th August 2013 - Side Story: A Certain Collaboration Completed
  • 24th July 2013 - Side Stories: An Ending's Continuation(Not Canon) and There's No Way My Black Haired Little Sister is This Cute Completed
  • 14th July 2013 - Volume 12 Chapter 6 and Epilogue Completed
  • 12th July 2013 - Volume 12 Chapter 5 Completed
  • 9th July 2013 - Volume 12 Chapter 4 Completed
  • 5th July 2013 - Volume 12 Chapter 3 Completed
  • 29th June 2013 - Volume 12 Chapter 2 Completed
  • 26th June 2013 - Volume 12 Chapter 1 Completed
  • Older updates can be found on the Updates Archive.



Those who wish to contribute are asked to first notify a supervisor beforehand via the forum.

Translators please register for chapters they want to work on

Format Standards

Every Chapter (after editing) must conform to the general format guidelines.

The Ore no Imōto ga Konna ni Kawaii Wake ga Nai series by Tsukasa Fushimi

Drama CD Insert Commissioned Short Story Booklet

Ore no Imōto ga Konna ni Kawaii Wake ga Nai-Drama CD Front Cover.jpg

A Certain Clubroom's Fanatic

Pseudepigrapha Railgun cover.jpg

My Little Sister Can't Be This Cute Previous Day Tale

DVD Box Short Stories

The following DVD Box short story, 'I can't Possibly Ask for Life Counseling From My Brother', describes the perspective of Kirino covering a short portion of the events in Volume 1. It is a hosted translation with permission and credited to C.E Light Novels Translations. The translation is locked from edits on their request. Do visit their blog for other translation projects.

An Ending's Continuation

There's No Way My Black Haired Little Sister is This Cute

10 Year Reunion

10 Year Reunion Cover.jpg

A Certain Collaboration (Full Text)

A Chance Encounter

You can still tell us how you liked the teasers at the project thread in the forum.

Project Staff

  • Supervisor:
  • Project Manager: Chaos



  • Chaos
  • (External) NanoDesu
  • Fragment Traveler (translated "10 Year Reunion" & "A Chance Encounter" outside of Baka-Tsuki)






Other Contributors

Series Overview


  • 俺の妹がこんなに可愛いわけがない〈01〉(August 10, 2008 ISBN 978-4-0486-7180-4)
  • 俺の妹がこんなに可愛いわけがない〈02〉(December 5, 2008 ISBN 978-4-0486-7426-3)
  • 俺の妹がこんなに可愛いわけがない〈03〉(April 9, 2009 ISBN 978-4-0486-7758-5)
  • 俺の妹がこんなに可愛いわけがない〈04〉(August 10, 2009 ISBN 978-4-0486-7934-3)
  • 俺の妹がこんなに可愛いわけがない〈05〉(January 10, 2010 ISBN 978-4-0486-8271-8)
  • 俺の妹がこんなに可愛いわけがない〈06〉(May 10, 2010 ISBN 978-4-0486-8538-2)
  • 俺の妹がこんなに可愛いわけがない〈07〉(November 10, 2010 ISBN 978-4-0487-0052-8)
  • 俺の妹がこんなに可愛いわけがない〈08〉(May 10, 2011 ISBN 978-4-0487-0486-1)
  • 俺の妹がこんなに可愛いわけがない〈09〉(September 10, 2011 ISBN 978-4-0487-0813-5)
  • 俺の妹がこんなに可愛いわけがない〈10〉(April 10, 2012 ISBN 978-4-04-886519-7)
  • 俺の妹がこんなに可愛いわけがない〈11〉(September 10, 2012 ISBN 978-4-04-886887-7)
  • 俺の妹がこんなに可愛いわけがない〈12〉(June 7, 2013 ISBN 978-4-04-891607-3)


  • Drama CD Shorts: 「俺の妹がこんなに可愛いわけがない」ドラマCD (April 8, 2010 ASIN B00368C3VW)
    • At A Certain Maid Cafe/とあるメイド喫茶にて
    • Recollections of Valentine's Day/バレンタインの想い出
    • Ayase's Council Matter - Shyness Chapter/あやせの相談事・羞恥編 (My little sister can't be hook up in a psp game)
  • Pseudepigrapha Railgun: 偽典・超電磁砲 (June 26, 2010 ISBN 978-4048685535)- Bundled with 'A Certain Scientific Railgun' manga Volume 5
    • A Certain Clubrooms Video Addict(Fanatic)/とある部室の映像中毒<ファナティック>
  • Magazine: 電撃文庫 MAGAZINE (マガジン) 2010年 11月号 (October 9, 2010 ASIN: B004438O98)- Dengeki Bunko Magazine November Edition
    • House-sitting in a Thunderstorm/雷雨の留守番
  • DVD Box Short: 俺の妹がこんなに可愛いわけがない 1 【完全生産限定版】(December 22, 2010 EAN: 4534530041685)
    • I can't Possibly Ask for Life Counseling From My Brother/あたしが兄貴に人生相談なんてするわけない
    • Memories of a Fallen Angel/堕天聖の追憶
  • PSP Game: 「俺の妹がこんなに可愛いわけがない ポータブル」ずっとこのまま♪パック( 特典なし ) (January 27, 2011 ASIN: B004L2K12K)
    • An Ending's Continuation/或る結末の続き
  • Anime Guidebook: アニメ『俺の妹』がこんなに丸裸なわけがない (September 28, 2011 ISBN 978-4048706490)
    • There's No Way My Black Haired Little Sister is This Cute/黒髪の妹がこんなに可愛いわけがない
  • DVD Box Short Season 2: 俺の妹がこんなに可愛いわけがない。 1(完全生産限定版) (June 19, 2013 EAN:4534530066404)
    • 10 years Reunion/十年目の再会
  • My Little Sister and Railgun Collaboration Project!: 俺の妹と超電磁砲のコラボプロジェクト!(Started June 14, 2013 -No longer online-)
    • A Certain Collaboration /とあるコラボ
  • Kanzaki Hiro's Cute Illustrations: かんざきひろ画集 Cute (June 25, 2014 ISBN 978-4-04-866197-3)
    • A Momentary Chance Encounter/一時の邂逅