01/05/2023 - 03/23/2023 Finished
Onimai: I'm Now Your Sister! (Oniichan wa Oshimai!)
Also known as: お兄ちゃんはおしまい！
Self-professed "home security guard" Mahiro Oyama has not left his home in years, secluding himself in his room playing erotic visual novels. This depraved lifestyle causes his prodigious sister, Mihari, to worry about his well-being. In hopes of solving this problem, she devises a plan to rehabilitate him back to normalcy. The first part of Mihari's plan is to concoct a medicine that changes her brother's biological constitution into a bona fide female, much to Mahiro's vehement dismay. Stuck in this predicament, Mahiro has no choice but to live out his life as a cute girl until the effect wears off—if it ever does.
12
Total episodes
12
Canon episodes
0
Filler episodes
0%
% Filler
Canon episodes · 12 Filler episodes · 0
Related works
Related works and sequels
Standalone work
No sequel, prequel, or registered spin-off is linked to Oniichan wa Oshimai!. Its episode total belongs to this title alone.
What to watch, what to skip
Watch order: filler vs canon
Oniichan wa Oshimai! has no filler episodes: all 12 episodes are canon. You can watch it from first to last without checking any list of skippable episodes.
Episode by episode
Complete guide by season
12 Episodes
| # | Episodes | Aired | Type |
|---|---|---|---|
| 1 | Mahiro's Confusing New Body01/05/2023 | 01/05/2023 | Canon |
| 2 | Mahiro's Time of the Month01/12/2023 | 01/12/2023 | Canon |
| 3 | Mahiro's Close Encounter01/19/2023 | 01/19/2023 | Canon |
| 4 | Mahiro's New Friend01/26/2023 | 01/26/2023 | Canon |
| 5 | Mahiro Discovers Adventure and Social Gatherings02/02/2023 | 02/02/2023 | Canon |
| 6 | Mahiro Goes Back to Middle School02/09/2023 | 02/09/2023 | Canon |
| 7 | Mahiro's Role-Playing Game02/16/2023 | 02/16/2023 | Canon |
| 8 | Mahiro's First Girls Sleepover02/23/2023 | 02/23/2023 | Canon |
| 9 | Mahiro Rings In the New Year03/02/2023 | 03/02/2023 | Canon |
| 10 | Mahiro Ponders Boobs and Identity03/09/2023 | 03/09/2023 | Canon |
| 11 | Mahiro Pretties Up03/16/2023 | 03/16/2023 | Canon |
| 12 | Mahiro's Future as a Sister03/23/2023 | 03/23/2023 | Canon |
Verified legal platforms
Where to watch Onimai: I'm Now Your Sister!
All the platforms where you can watch Onimai: I'm Now Your Sister! legally, with direct links to each service.
We don't have confirmed streaming platforms for this anime yet.
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Common questions
Frequently asked questions
How many seasons does Oniichan wa Oshimai! have?
Oniichan wa Oshimai! has a total of 1 season. The series is completed. Each season is divided into multiple episodes with stories that advance the main plot of the anime.
How many episodes does Oniichan wa Oshimai! have?
In total, Oniichan wa Oshimai! has 12 episodes in its only season. You can consult the complete episodes table to see the breakdown by season.
What is the best order to watch Oniichan wa Oshimai!?
It is recommended to watch Oniichan wa Oshimai! in chronological broadcast order. This means starting from season 1 and continuing sequentially to the last season. Check our watch order guide which includes information about filler vs canon episodes for an optimal experience.
Where can I watch Oniichan wa Oshimai! online?
Oniichan wa Oshimai! is available on various legal streaming platforms. Check the platforms section at the top of this page to see where it's currently available. Options may vary depending on your geographic region.
Is Oniichan wa Oshimai! a complete anime?
Yes, Oniichan wa Oshimai! is a completed anime. All seasons have already aired and you can enjoy the series in its entirety without waiting for new episodes.
Where can I see Oniichan wa Oshimai!'s score and reviews on MyAnimeList?
You can check the score, reviews, characters and statistics for Oniichan wa Oshimai! directly on MyAnimeList, the world's largest anime database. There you'll find the community rating, global ranking and opinions from other fans.