OniAi
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 has a serious brother complex, and she’s definitely not interested in sharing his attention. Unfortunately for little sister, she and Akito won’t be living alone: three gorgeous girls from the student council will be along for the ride! So much for the peaceful existence Akito was craving. Big Brother the dreamy will have to stay on his toes to avoid the advances of Sis and her ravishing rivals!
Where to watch OniAi in United States
Crunchyroll
Crunchyroll Amazon ChannelClick a service to open OniAi there. Availability last verified on June 20, 2026.
Where is OniAi streaming around the world?
| Country | Streaming on | Rent / Buy |
|---|---|---|
| United States | Crunchyroll, Crunchyroll Amazon Channel | — |
| United Kingdom | Crunchyroll, Crunchyroll Amazon Channel | — |
| Canada | Crunchyroll Amazon Channel, Crunchyroll | — |
| Australia | Crunchyroll, Crunchyroll Amazon Channel | — |
| Japan | U-NEXT, Anime Times Amazon Channel, dAnime Amazon Channel, Amazon Prime Video | Amazon Video, FOD, Google Play Movies |
About OniAi
OniAi is a 2012 Japanese-language animation, comedy and romance series created by Daisuke Suzuki. The cast is led by Ryota Osaka, Ibuki Kido, Minori Chihara. It spans 1 season and 12 episodes and has concluded. In United States, it is currently streaming on Crunchyroll, Crunchyroll Amazon Channel.
OniAi was produced by SILVER LINK., Media Factory, and Lantis and made in Japan. It was first aired on October 5, 2012, and carries a TV-MA certification.
- Created by
- Daisuke Suzuki
- First aired
- October 5, 2012
- Last aired
- December 21, 2012
- Original language
- Japanese
- Age rating
- TV-MA
- Status
- Ended
- Seasons
- 1 (12 episodes)
- Network
- AT-X
- Country
- Japan
- Production
- SILVER LINK., Media Factory, Lantis
OniAi cast & crew
OniAi was created by Daisuke Suzuki.
The cast features Ryota Osaka as Akito Himenokoji (voice), Ibuki Kido as Akiko Himenokoji (voice), Minori Chihara as Anastasia Nasuhara (voice), Asami Shimoda as Ginbei Haruomi Sawatari (voice), and Eri Kitamura as Arashi Nikaido (voice).
Behind the camera, the score was composed by Takahiro Ando, cinematography is by Kojiro Hayashi, and it was produced by Osamu Hosokawa and Makoto Ito.
Is OniAi worth watching?
With 1 season and 12 episodes, it's a quick, bingeable run.
If you enjoy animation, comedy, and romance, OniAi is worth a place on your watchlist.
How and where to watch OniAi
In United States, you can stream OniAi on Crunchyroll and Crunchyroll Amazon Channel. Click any service above to open it directly.
Streaming rights change country by country and month by month, so the options above reflect United States today — switch your country at the top of the where-to-watch section to see availability elsewhere.
Rate & review
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Cast of OniAi
Ryota Osaka
Akito Himenokoji (voice)
Ibuki Kido
Akiko Himenokoji (voice)
Minori Chihara
Anastasia Nasuhara (voice)
Asami Shimoda
Ginbei Haruomi Sawatari (voice)
Eri Kitamura
Arashi Nikaido (voice)
OniAi — FAQs
▸Where can I watch OniAi in United States?
OniAi is streaming on Crunchyroll, Crunchyroll Amazon Channel in United States.
▸Is OniAi on Crunchyroll?
Yes — OniAi is currently available on Crunchyroll in United States.
▸What language is OniAi in?
OniAi is originally in Japanese. Subtitle and dub options vary by streaming service.
▸How many seasons of OniAi are there?
OniAi has 1 season with 12 episodes in total.
▸What is OniAi rated?
OniAi is rated TV-MA. It holds a 6.4/10 audience score from 24 ratings.
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