Aneki no Kounai Kaikinbi

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Alternative Titles

Japanese: アネキの口内解禁日


Type: OVA
Episodes: 1
Status: Finished Airing
Aired: Feb 17, 2012
Producers: ChiChinoya
Licensors: None found, add some
Studios: Okumaza
Source: Original
Genre: HentaiHentai
Duration: 17 min.
Rating: Rx - Hentai


Score: 5.461 (scored by 39643,964 users)
1 indicates a weighted score.
Ranked: N/A2
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #6766
Members: 8,948
Favorites: 41

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Ranked N/APopularity #6766Members 8,948
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Episodes: /1


When 23-year-old Hirose Anna finds out that her little brother masturbates with her dirty underwear, she decides to take things a step further by allowing him to see her do naughty things as well. Each time the situations escalate until she comes out and tells him that as his big sister she will take responsibility for his sexual curiosity. She allows him to do anything with her except for proper sex; yet as his requests get dirtier each time, she remains determined to take responsibility and keep things going no matter what.

(Source: ANN, modified at BakaBT)

Characters & Voice Actors




Komai, Kazuya
Script, Key Animation


Opening Theme

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Ending Theme

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Mar 10, 2017
Another one-off episode brings the same thoughts I always have, will this have enough content for it to stand out and most importantly will I enjoy it? Aneki no Kounai Kaikinbi is a story containing incestuous activity but no sex so does this make for good or bad?

Hirose Anna is 23, her little brother Yuichi is coming into the age of sexual interest after catching him masturbating with her dirty underwear. Seeing this and feeling excited herself seeing it she decides to help satisfy his sexual curiosity by her performing dirty things but as these begin to escalate will she continue to do this?

It’s a ...
Oct 11, 2019
Mixed Feelings
This single episode low-budget anime is about an elder sister who feels a reluctant sense of duty and obligation to fulfill all the sexual desires of her younger brother which quickly grows into being a sexual slave to all of his friends and acquaintances.

The standout feature of this anime is the clear lack of budget in the production, only one of the characters is voiced, a lot of the scenes are simply pictures or looped footage and there is no background music.

Despite this it is not terribly bad, the single character manages to carry the whole story and explain the background ...
Nov 3, 2014
This, Ladies and Gentelmen...was the most horrible thing I have seen, in the last 5 years of my life).

So let's start with the story, it all begins when this girl called Hannah or Anna (whichever) sees her younger brother masterbating with her underwear (shit happens), so then, she decided that she would take care of her brothers sexuality (probably thinking it would make him healthy or something). But she has terms :"her brother can do anything he wants with her as long as it's not actual sex" meaning, only oral, kisses, handjobs, ect..... He also loves to take sexy pics or videos of her when ...


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Recent Forum Discussion

Poll: Aneki no Kounai Kaikinbi Episode 1 Discussion
Angra-Mainyu - Aug 18, 2012
11 repliesby OP_Rider »»
Jul 31, 2023 8:10 PM
Episode 2
yhunata - Feb 14, 2013
1 repliesby Blaz »»
Sep 9, 2013 8:56 AM