OniAi
A AT-X Original
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
Akito Himenokoji (voice)
Ibuki Kido
Akiko Himenokoji (voice)
Minori Chihara
Anastasia Nasuhara (voice)
Asami Shimoda
Ginbei Haruomi Sawatari (voice)
Eri Kitamura
Arashi Nikaido (voice)
Created by: Daisuke Suzuki, Kazuyuki Fudeyasu
Seasons (1 season, 12 episodes)
Season 1
12 episodes - 2012