OniAi poster

OniAi

TV Show TV-MA 2012 25m/ep 6.5 /10 Ended
AT-X A AT-X Original
Created by Daisuke Suzuki, Kazuyuki Fudeyasu

Akito Himenokoji is a stylish, easygoing older brother whose reappearance at home sets the stage for something unusual. His younger sister Akiko is overjoyed to be back under his roof, and she clearly loves being the sole focus of his attention. Yet peace does not last, because three confident... Read more

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Streaming availability last verified: January 14, 2026

About OniAi

Akito Himenokoji is a stylish, easygoing older brother whose reappearance at home sets the stage for something unusual. His younger sister Akiko is overjoyed to be back under his roof, and she clearly loves being the sole focus of his attention. Yet peace does not last, because three confident members of the student council also move in, bringing flirtations and chaos. The house becomes a stage for comic misreads and playful rivalries as Akito tries to keep the balance between family closeness and teenager romance. What follows is a lighthearted romp through affection, misunderstandings, and neighborly schemes. What makes this setup funny is the clash between a protective brother figure and the affection driven rivals.

OniAi, a 2012 anime, is credited to Daisuke Suzuki and Kazuyuki Fudeyasu. The voice cast includes Ryota Osaka as Akito Himenokoji, Ibuki Kido as Akiko Himenokoji, Minori Chihara as Anastasia Nasuhara, Asami Shimoda as Ginbei Haruomi Sawatari and Eri Kitamura as Arashi Nikaido. The director and exact source material aren't listed in the provided data.

OniAi sits in the early 2010s wave of light hearted romance comedies that blend family style closeness with playful flirting. It fed into ongoing conversations about how sibling affection is depicted in anime and how audiences react to edgy humor. Although not a landmark, it shows how creators experimented with the boundaries of affection within a classroom and home setting.

Reception for OniAi appears lukewarm among viewers, with an average of 6.5 out of 10 from 21 votes. The show leans into a light romance and a harem style setup, focusing on awkward situations, witty exchanges, and the strain of divided attention among siblings and friends. It balances cheeky charm with familiar trope material.

Box office data is not applicable to this TV series. There are no worldwide box office figures to report and distribution occurred through television and home media channels.

Details

Release Date
October 05, 2012
Episode Length
25m
Rating
TV-MA
User Ratings
21 votes
Type
TV Series
Seasons
1
Episodes
12
Network
AT-X
Status
Ended
Genres
Animation, Comedy, Romance
Country
Japan
Studio
SILVER LINK. +4 more
External Links
View on IMDB

Official Trailer

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)

Created by: Daisuke Suzuki, Kazuyuki Fudeyasu

Seasons (1 season, 12 episodes)

Season 1

Season 1

12 episodes - 2012

Frequently Asked Questions

OniAi is available to stream on Crunchyroll.

Yes, OniAi is available to stream on Crunchyroll.

OniAi has 1 season with a total of 12 episodes.

With a rating of 6.5/10 from 21 viewers, OniAi is considered decent by viewers and may be worth checking out.

Akito Himenokoji is a stylish, easygoing older brother whose reappearance at home sets the stage for something unusual. His younger sister Akiko is overjoyed to be back under his roof, and she clearly loves being the sole focus of his attention. Yet peace does not last, because three confident me...

OniAi stars Ryota Osaka, Ibuki Kido, Minori Chihara, Asami Shimoda, and Eri Kitamura.

OniAi was created by Daisuke Suzuki and Kazuyuki Fudeyasu.

OniAi was released on October 05, 2012.

OniAi is a Animation, Comedy, and Romance series.

There is only 1 season of OniAi, which has 12 episodes. The series is listed as Ended.

OniAi has 12 episodes across its single season. It aired in 2012 and is finished.

OniAi is rated TV-MA, indicating mature content intended for adult audiences. It's not recommended for kids.

The main voice cast includes Ryota Osaka as Akito Himenokoji, Ibuki Kido as Akiko Himenokoji, Minori Chihara as Anastasia Nasuhara, Asami Shimoda as Ginbei Haruomi Sawatari, and Eri Kitamura as Arashi Nikaido. These characters drive the central romance and comedy dynamics of the show.