Anastasia Nasuhara
main character
TV
6.0
My TrackerPLANNING
Episode: 0 / 12
My Score:
Anime DetailsFINISHED
Estimated watch time
4h 48m
⚡ 3 days at 5 eps/day
Tags & Tropes
Kuudere100%Female Harem98%Incest84%School83%Nudity72%Heterosexual60%School Club60%Idol60%Primarily Teen Cast60%Bisexual40%
TVFINISHED2012 FALL6.0 / 10 AniList score
OniAi
お兄ちゃんだけど愛さえあれば関係ないよねっ• Onii-chan Dakedo Ai Sae Areba Kankeinai yo ne!
Synopsis & Story
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. This pint-sized cutie has a big brother complex, and she’s 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! (Source: Crunchyroll)
Trailer
Search YouTubeWhere to Watch Officially
Availability, audio and subtitles vary by region and service.
Featured Cast & Voice Actors
Franchise Universe & Related Entries
Aniphoria guide
OniAi: should you watch it?
At a glance
OniAi has been met with mixed reactions, with an average AniList score of 60/100 — 20% of 26,161 ratings are 8/10 or higher.
It ranks #40 most popular anime of 2012, and #17 most popular anime of Fall 2012 on AniList.
Of the 48.6K AniList users who started it, 7.7% dropped it, so it is dropped at a typical rate; 38.7K have finished it.
At about 4 h 48 min in total, it is a short commitment — a weekend binge.
Best for viewers who enjoy Comedy, Ecchi, Romance — especially kuudere, female harem, incest, school.
Where it fits in the series
- Optional extras: OniAi Specials
Episodes
12 episodes are listed.
Main cast & creators
- Anastasia Nasuhara
- Akiko Himenokouji
- Arashi Nikaidou
- Akito Himenokouji
- Ginbei Haruomi Sawatari
- Arisa Takanomiya
- Original creator
- Daisuke Suzuki
- Director
- Keiichirou Kawaguchi
- Series composition
- Kazuyuki Fudeyasu
- Character design
- Kousuke Kawamura
Opening & ending themes
Openings
- OP1“SELF PRODUCER” by Minori Chihara · eps 2-4
Endings
- ED1“Life-Ru is LOVE-Ru!!” by Eri Kitamura · eps 2-12
Theme data from AnimeThemes.moe.
OniAi FAQ
- How many episodes does OniAi have?
- OniAi has 12 episodes of about 24 minutes each, roughly 4 h 48 min in total.
- How long does it take to watch OniAi?
- About 4 h 48 min back to back. At two episodes a day it takes 6 days; at one hour a day, about 5 days.
- Is OniAi finished?
- Yes. OniAi has finished airing — the final episode aired December 21, 2012.
- Is there a season 2 of OniAi?
- No sequel is listed for OniAi as of October 2026. You can continue the story in the original light novel.
- Is OniAi based on a light novel?
- Yes. OniAi adapts the light novel by Daisuke Suzuki.
- Who animated OniAi?
- OniAi was animated by SILVER LINK. and directed by Keiichirou Kawaguchi.
- Who sings the opening of OniAi?
- The opening, "SELF PRODUCER", is performed by Minori Chihara.
- Where can I watch OniAi?
- OniAi is listed on Crunchyroll. Availability varies by region — check the streaming links on this page.