OniAi poster
Where to stream

OniAi

6.420121 seasonTV-MATV SeriesAnimationComedyRomance

Adorable young Akiko is thrilled to be reuniting with Akito, the handsome older brother she hasn’t seen in years! In fact, she might be a little too excited about living under the same roof with her precious big bro. This pint-sized cutie…

DirectorKeiichiro Kawaguchi
ProducersOsamu Hosokawa·Makoto Ito

Where to watch

U-NEXTU-NEXTAnime Times Amazon ChannelAnime Times Amazon ChanneldAnime Amazon ChanneldAnime Amazon Channel
Availability shown for Japan · rights vary by country

Seasons & Episodes

E1
Brother Love
Oct 5, 2012
E2
Indecent
Oct 12, 2012
E3
No Bra
Oct 19, 2012
E4
Naked
Oct 26, 2012
E5
Sexual desires
Nov 2, 2012
E6
Mayonnaise & chicken
Nov 9, 2012
E7
Chippai
Nov 16, 2012
E8
Colorful
Nov 23, 2012
E9
Nii-Nii
Nov 30, 2012
E10
“Gindama”
Dec 7, 2012
E11
Ephemeral
Dec 14, 2012
E12
It's love
Dec 21, 2012

Cast

Ryota Osaka
Ryota Osaka
Akito Himenokoji (voice)
Ibuki Kido
Ibuki Kido
Akiko Himenokoji (voice)
Minori Chihara
Minori Chihara
Anastasia Nasuhara (voice)
Asami Shimoda
Asami Shimoda
Ginbei Haruomi Sawatari (voice)
Eri Kitamura
Eri Kitamura
Arashi Nikaido (voice)

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OniAi — streaming FAQ

Which OTT platform streams OniAi?

OniAi is streaming on U-NEXT, Anime Times and dAnime in Japan, and available to rent or buy on Amazon Video and FOD. It's not currently on Netflix.

Is OniAi on Netflix?

No, OniAi is not on Netflix in Japan as of August 2026. It's currently on U-NEXT and Anime Times.

Is OniAi on Amazon Prime Video?

OniAi isn't included with a Prime Video subscription in Japan, but you can rent or buy it on Amazon Video.

Where can I watch OniAi for free?

OniAi is available to stream free (with ads) on Amazon Prime Video in Japan.

How many seasons are in OniAi?

OniAi has 1 season in total (12 episodes). The series concluded in 2012.

Are all episodes of OniAi out yet?

Yes — all 12 episodes across 1 season of OniAi are out and available to stream.

Is there a Season 2 of OniAi?

No — OniAi ended after 1 season, so there is no Season 2.