01/05/2023 - 03/23/2023 Finished
Oniichan wa Oshimai! (お兄ちゃんはおしまい！)
Also known as: Onimai: I'm Now Your Sister!
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
Every season
Seasons and sequels
Single Season
Currently, Oniichan wa Oshimai! has no sequels, prequels, or registered spin-offs. This is the complete story available at the moment.
What to watch, what to skip
Watch order: filler vs canon
You're in luck! Oniichan wa Oshimai! doesn't have a single filler episode: all 12 episodes are canon. It's a faithful adaptation of the original manga, so you can enjoy it from first to last without skipping anything or checking any list of expendable episodes.
The 12 episodes of Oniichan wa Oshimai! aired in 2023 and follow the story's chronological order. There are no transition episodes, no needless recaps, no arcs invented by the studio: every chapter advances the main plot and develops the characters just as the source material does.
In short, the watch order for Oniichan wa Oshimai! is as simple as it gets: start at episode 1 and keep going to episode 12 without detours. If you came looking for which Oniichan wa Oshimai! episodes are filler so you could skip them, the answer is that there aren't any.
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 Oniichan wa Oshimai!
All the platforms where you can watch Oniichan wa Oshimai! legally, with direct links to each service.
We don't have confirmed streaming platforms for this anime yet.
Liked it? Keep going
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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 the following streaming platforms: Animation Digital Network. Check the platforms section at the top of this page to access where you can watch the anime. Please note that availability may vary depending on your geographic region.
Watch on: Animation Digital Network
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.
How much filler does Oniichan wa Oshimai! have?
No, Oniichan wa Oshimai! does not have filler episodes. All its episodes are canon and faithfully follow the original manga story, so you can watch all episodes without worrying about skipping anything.
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.