recursal/Fanatic-Fandom huggingface dataset:
Momiji's Panty Problem

* English
* Japanese

**Momiji's Panty Problem** (もみじとパンツ, *Momiji To Pantsu*) is Chapter 63.5 of *Onimai: I'm Now Your Sister!*. It was originally published in Volume 21 of the doujinshi which was released on May 5, 2022.

## Summary

Still soaking wet from the rain, Momiji asks Mihari if she can borrow some of her underwear.

## Plot

Mihari is in a state of shock, being surprised that Momiji just asked her to lend her a pair of panties.

As Mihari rummages through her drawer to find a pair, Momiji notes in embarassment that she'll be fine with anything.

Mihari finds a set of polka-dotted panties and notes that she can't show her these as she's probably used to seeing Kaede's underwear.

Taking out a pair that has a picture of an Onima on it, Mihari notes that these won't do either.

Eventually, Momiji settles on a very adult set of panties that constitute lingerie. Mihari asks Momiji if these will do, and Momiji is shocked to see a side of Mihari like this that she's never seen before.

After the rain stops, Momiji changes back into her now dry unifrom, prepares to leave, and says that she'll wash the panties and return them. Mihari waves Momiji goodbye and confirms this, all the while apologizing for what happened.

Eventually, Momiji arrives home and decides to wash the panties right away. As she slips out of them and prepares to put them in the wash, Kaede comes in with the laundry suggesting that she mix in some other stuff. Kaede catches Momiji holding the adult underwear, much to Momiji's embarassment.

Kaede immediately nuzzles Momiji noting how they really do grow up fast. Momiji turns beet red and insists that they're not hers. Mihari continues to apologize for all this.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Kaede Hozuki
* Momiji Hozuki

## Trivia

* This chapter takes place during and after the events of the previous chapter "Mahiro Shelters From the Storm" after Momiji asks Mihari to lend her some panties and after it is revealed that she's wearing them.
* The panties that Mihari lends to Momiji are the same pair that Mahiro found in Mihari's drawers during the events of "Mahiro's Deep Clean".
Enough Reincarnation!

**Enough Reincarnation!** (転生はおしまい！, *Tensei Wa Oshimai!*) is the twenty-sixth chapter of the *Onimai: I'm Now Your Sister!* anthology series. It is written and illustrated by Tsuchii. It was originally published as part of Volume 2 of the anthology series on April 27, 2022.

## Summary

Mahiro and her friends cosplay and reinact an isekai manga as part of a school project.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Momiji Hozuki
* Asahi Ōka
* Miyo Murosaki
* Nayuta Tenkawa

## Trivia

* This chapter is written and illustrated by Tsuchii.
Mahiro is a Little Girl

**Mahiro is a Little Girl** (まひろがようじょ, *Mahiro Ga Yōji ~Yo*) is the twenty-seventh chapter of the *Onimai: I'm Now Your Sister!* anthology series. It is written and illustrated by Akane Terai. It was originally published as part of Volume 2 of the anthology series on April 27, 2022.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Kaede Hozuki
* Momiji Hozuki

## Trivia

* This chapter is written and illustrated by Akane Terai.
Mahiro and the Spankies

* English
* Japanese

**Mahiro and the Spankies** (まひろとアンスコ, *Mahiro To Ansuko*) is Chapter 41.7 of *Onimai: I'm Now Your Sister!*. It was originally published in Volume 14 of the doujinshi which was released on August 15, 2020.

## Summary

Mihari has Mahiro try on a pair of spankies.

## Plot

Mahiro is shown wearing her school uniform and fidgeting her private area. Mihari asks her how she likes the spankies that she bought for Mahiro. Mahiro says that she can't tell if she should feel less self-conscious or more. Mihari decides to take a look and lifts up Mahiro's skirt so she can see, much to Mahiro's embarrassment. Mihari says that they're not underwear, and asks Mahiro if it's fine, saying that it should be. Mahiro says that it's not fine, as they're practically identical.

Mahiro thinks to herself that she really doesn't get how women think, comparing it to the swimsuit thing. She notes however that she likes bloomers just fine.

## Characters

* Mahiro Oyama
* Mihari Oyama

## Trivia

* Mahiro references how she didn't understand women's obsession with swimsuits in "Mahiro and the Girls' Day Out".
Onimai: I'm Now Your Sister! (anime)

*See also: Onimai: I'm Now Your Sister! (manga) and Onimai*

* Main Poster
* Logo

***Onimai: I'm Now Your Sister!*** (お兄ちゃんはおしまい!, *Onii-chan wa Oshimai!*) is a Japanese anime series based on the manga series of the same name by Nekotofu. It originally aired on AT-X, Tokyo MX, and BS11 from January 5, 2023 to March 23, 2023.

## Plot

The series follows Mahiro Oyama, a NEET and otaku living with his scientist younger sister Mihari. One day he wakes up as a young girl, a result of one of Mihari's experiments. Mahiro must now learn to live as a middle school girl, all while making friends in his new school.

## Production

An anime television series adaptation was announced on April 22, 2022. It is produced by Studio Bind and directed by Shingo Fujii, with scripts written by Michiko Yokote, character designs handled by Ryo Imamura, and music composed by Daisuke Achiba and Alisa Okehazama. The series premiered on January 5, 2023, on AT-X and other networks. The opening theme song is "Identeitei Meltdown" (アイデン貞貞メルトダウン) by P Maru-sama and Enako, while the ending theme song is "Himegoto \* Cry Sisters" (ひめごと＊クライシスターズ) by Marika Kōno, Kaori Ishihara, Hisako Kanemoto, and Minami Tsuda. Crunchyroll has licensed the series outside of Asia. Medialink has licensed the series in South and Southeast Asia.

According to the series official website, a single season of 12 episodes have been ordered with plans to release them in two separate Blu-ray volumes. The first volume will be released on April 19, 2023 and will contain episodes 1-6, and the second volume will be released on June 21, 2023 and will contain episodes 7-12.

## Episodes

*See also: List of Onimai: I'm Now Your Sister! Episodes*
Mahiro and the Spicy Kiss

* English
* Japanese

**Mahiro and the Spicy Kiss** (まひろと熱いベーゼ, *Mahiro To Atsui Be-ze*) is Chapter 30.5 of *Onimai: I'm Now Your Sister!*. It was originally published on *Pixiv* on August 6, 2019.

## Summary

To celebrate the new year, Mihari drinks some of Kaede's amazake.

## Plot

At the Hozuki residence, everyone has changed into casual wear and are about to eat dinner. Mahiro is amazed at this being Kaede's cooking, and Mihari notes that it wouldn't be New Year's Day without it, wondering if she should've made some as well. Kaede mentions that she also made some amazake, which Mihari has never had before. Asahi asks Mihari if she should be drinking, and Miyo remarks that amazake is okay for minors as long as they don't have too much. Momiji adds that most of the alcohol gets cooked off, and Mahiro adds that it is perfectly legal.

Mihari takes a single sip of the amazake and starts looking dazed. Mahiro asks her if she's alright, to which Mihari starts chuckling. Mihari hugs Mahiro saying that she loves her, also calling her "onii-chan", much to Mahiro's shock. Mihari starts kissing Mahiro on the cheek repeatedly. Mahiro tells her to quit is as there are people watching, and Kaede is shocked that Mihari got drunk off of a low alcohol drink like amazake.

Kaede pulls Mihari off of Mahiro, telling her that that is not her brother, telling her to wake up. Mihari decides to instead is Kaede on the lips, referring to her as "onee-chan", much to Kaede's shock. Mahiro is scared, realizing that Mihari is totally wasted.

Mahiro tells the others fall back and retreat to Momiji's room or else they'll be next. Momiji and Asahi gladly do, but Miyo remains still. Mahiro tells her to hurry up, but Miyo says that she can't as she's paralyzed with ecstasy at this. Mihari then glares at Miyo, leading Mahiro to say "uh-oh".

Some time later, Mihari wakes up, fully sober. Asahi is shocked that she's awake, while Momiji asks if she's okay. Mihari has no memory of what happened and asks Kaede and Mahiro what happened. The two remain silent on that.

Kaede tells Mihari that she is banned from alcohol for the rest of her life, which leaves Mihari confused. Miyo gives Mihari a lovey-dovey expression, calling her "onee-sama", having been presumably kissed by her as well, much to Mihari's shock.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Kaede Hozuki
* Momiji Hozuki
* Asahi Ōka
* Miyo Murosaki

## Trivia

* "ベーゼ" (be-ze) in the original title is *baiser*, French for "kiss."
* The events of this chapter occur directly after the events of "Mahiro Rings in the New Year".
* As mentioned in the previous chapter, osechi is a set of box-lunch-like meals prepared in advance, as it's considered bad luck in Japan to cook for the first three days of the year.
* As mentioned in the chapter, amazake is a very low alcohol wine consumed during New Year's celebrations. This shows off how Mihari has zero tolerance for alcohol, becoming drunk after a single sip of it.
* This is the only 0.5 chapter to be released on *Pixiv* as opposed to one of the doujinshi volumes.
Doujinshi Volume 8

**Volume 8** (お兄ちゃんはおしまい!⑧, *Onii-chan wa Oshimai!⑧*) is the eighth doujinshi volume of *Onimai: I'm Now Your Sister!*. It was originally distributed at COMITA127 on February 17, 2019 before receiving a general release on March 29, 2019.

## Trivia

* The two bonus chapters were released in Japan as two parts of Chapter 24.5, but were reclassified as Bonus chapters for their English release.
Mihari and the Stuffed Animal

* English
* Japanese

**Mihari and the Stuffed Animal** (みはりとぬいぐるみ, *Mihari To Nuigurumi*) is Chapter 42.5 of *Onimai: I'm Now Your Sister!*. It was originally published in Volume 14 of the doujinshi which was released on August 15, 2020.

## Summary

Mihari recalls her first experience at the amusement park as a child.

## Plot

At home, Mihari feels so much love for the stuffed toy that Mahiro won for her at the amusement park. Mahiro asks what kind of animal it is anyway, and Mihari says that it's the amusement park mascot, Oshima. Mihari also says that it has a big family, as there are five others to collect.

Mahiro understands and remarks the Mihari must love that little guy, noting that she had one like it as a kid as well. Mihari remembers that, and begins to recall how she got it.

When Mihari first visited Oshimaen with her family when she was seven years old, Mahiro played the same shooting game and she cheered him on telling him to go for it. Mahiro made a strike, and the vendor congratulated him, telling him that he won a prize. It was a stuffed mascot toy, different from the one that Mihari just got but from the same set. Mahiro gave it to Mihari, and she instantly fell in love with it.

Mihari notes that Mahiro hasn't changed a bit, but Mahiro doesn't know what she means.

Later, Mihari opens her closet, revealing that she still has that same stuffed mascot toy that Mahiro won for her all those years ago.

## Characters

* Mahiro Oyama
* Mihari Oyama

## Trivia

* The events of this chapter take place shortly after the events of the previous chapter "Mahiro and the Gifted Experience".
* It's not stated in this chapter, but the stuffed mascot that Mahiro won for Mihari is called "Onima" as seen in the previous chapter "Mahiro and the Gifted Experience".
* Considering that Mihari had the stuffed toy when she got separated from her family as seen in "Mahiro and the Gifted Experience", it can be assumed that Mihari's flashback took place before that event specifically occurred.
Kerori

**Kerori** (ケロリ, *Kerori*) is an MMO player who joins the guild that Mahiro is briefly a part of.

## Appearance

In the MMO, he have an appearance of a young middle school boy. He wears an eyepatch and a cape. He have short hair but long enough to reach his eyes.

## Personality

Kerori is shown to be a troublemaker. He had only just joined the guild that Mahiro was a part of, but Mahiro claimed not to like him. He was supposedly able to tell that Mahiro was really a guy based on how she typed, but Mahiro said that she was just being polite. He demanded proof, and was subsequently very shocked when Mahiro got on the voice chat to prove him wrong.

He is also shown to be a bit of an online predator as he apologized to Mahiro while also asking her to send him pictures in a private message, though Mahiro was self aware and knew to never send pictures to some random guy.

His actions ultimately lead to infighting within the guild over Mahiro and its subsequent disillusion.

## Etymology

* The name **Kerori** (ケロリ) means:
	+ completely; entirely
	+ nonchalantly; as if nothing happened
Mahiro and the Harem

**Mahiro and the Harem** (まひろとハーレム, *Mahiro To Hāremu*) is a special chapter of *Onimai: I'm Now Your Sister!*. It was originally published in Collected Works Volume 6 which was released on December 31, 2022.

## Summary

Mahiro realizes that her new life can be considerd a harem.

## Plot

Mahiro is reading the first edition of *Harem Academy*, a manga series about harems. As she finishes it and shuts it, she lets out a sigh of delight and notes that one can't go wrong with harems. She thinks how men's hopes and dreams fill those pages, and gushes over the idea of being surrounded by doting and adorable girls day and night. All of a sudden, imaging all of her new friends, Mahiro realizes that she very well might have a harem of her own going on right now. She then quickly tries to shut out the thoughts calling them blasphemous, but decides that it's okay as long as she's simply imagining it.

Mahiro tries to picture what it would be like to go out with one of them. She first imagines Mihari, but then decides that she's out of the question for obvious reasons and demands a changeover.

Mahiro moves onto Kaede as an option. She says that Kaede is the domestic type and so kind, and above all else has such devastating power, represented by her ample bust.

Mahiro admits though that Miyo won't go down without a fight either. Mahiro realizes that although she hadn't though about it before, Miyo's interests line up with hers as well, represented by their shared love of yuri manga. Mahiro decides that that must be critical in a relationship.

Mahiro decides that Momiji might turn out to be quite the mark, as she hadn't thought about how cute she might be. In the thought, Momiji dresses in a cute outfit saying that since the date is a date she decided that she may as well dress up for it. Mahiro realizes that this is a pure expression of gap moe.

Mahiro struggles to find a connection with Asahi, but realizes that she'd certaintly make for a fun time.

Mahiro notes that Nayuta is certaintly the devoted type, but that she might be a tad unhinged. This is represented by her ironing a shirt and then lovingly smelling it afterwards saying that it'll be their little secret. Mahiro notes, despite her delusion, that there's still nothing wrong with a twisted relationship.

Lying in bed, Mahiro notes that there is no way that she could possibly choose, as everyone has their own appeals and all of them are good. As Mahiro giggles and falls asleep, it's noted that these outrageous delusions darkened along with the night.

The next day at school, Asahi say good morning to Mahiro. Mahiro doesn't repsond though, as she's trembling with her hadns covering her face. Miyo wonders what's wrong with her, and Momiji notes that she's been like this all day. Mahiro notes to herself that she can't possibly look any of them in the eyes after that, as it's crazy for her to consider a middle-schooler as her romantic partner.

Nayuta notes that Mahiro is at a complicated time of her development, which Asahi considers very weird.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Kaede Hozuki
* Momiji Hozuki
* Asahi Ōka
* Miyo Murosaki
* Nayuta Tenkawa
Mahiro and the Health Committee

* English
* Japanese

**Mahiro and the Health Committee** (まひろと保健係, *Mahiro To Kokenkakari*) is Chapter 41.3 of *Onimai: I'm Now Your Sister!*. It was originally published in Volume 14 of the doujinshi which was released on August 15, 2020.

## Summary

Nayuta collects the record sheets from the school physical.

## Plot

Once everyone has had their physical exams, Nayuta announces that she is collecting the record sheets.

Mahiro is amazed that Nayuta is on the health committee, and Nayuta says that it comes in handy from time to time, much to Asahi's confusion. Mahiro thanks Nayuta while giving her her sheet, and Nayuta says that she doesn't need thanks as she enjoys it.

Nayuta looks over the sheets and chuckles, noting that she can now update her dossier. Miyo is left embarrassed while Mahiro angrily asks her in disbelief if that's what she likes about it.

## Characters

* Mahiro Oyama
* Asahi Ōka
* Miyo Murosaki
* Nayuta Tenkawa

## Trivia

* The events of this chapter take place shortly after the events of the previous chapter "Mahiro and the School Physical".
Mr. Nagase

**Mr. Nagase** (長瀬 (ながせ) , *Nagase*) is the father of Miyako Nagase.

## Relationships

### Miyako Nagase

Being a single father, Mr. Nagase is very close to his daughter. She calls him "daddy" and loves spending time with her. He buys her whatever she wants, and if he ever gets off early from work they take every opportunity to spend that time together. She equally returns the affection by offering to cook him whatever he wants for dinner.

## Etymology

* The name Nagase means "long" (長) (**naga**) and "rapids" (瀬) (**se**).

## Trivia

* For reasons unknown, the character profile included with Collected Works Volume 7 did not include his first name.
Mahiro and the Squishy Thingie

* English
* Japanese

**Mahiro and the Squishy Thingie** (まひろとプニプニ, *Mahiro To Punipuni*) is Chapter 58.5 of *Onimai: I'm Now Your Sister!*. It was originally published in Volume 20 of the doujinshi which was released on February 22, 2022.

## Plot

While swimming underwater, Asahi spots something that catches her eye. Surfacing, Asahi tells Mahiro to hold out her hand and Mahiro does so.

Mahiro is amazed to find that Asahi placed in her hand a sea cucumber. She notes how cute it is and notes that it's her first time touching one. Asahi notes that she thought Mahiro would freak out, evidenced by Momiji freaking out just by looking at it.

Mahiro starts to fondle the sea cucumber and begins to fall in love with the sensation of it squirming in her hands. The sea cucumber then abruptly sprays a goopy liquid all across Mahiro's face, much to her disgust. Nayuta explains that when a sea cucumber senses danger it vomits up its organs as a defense mechanism, with the statement leaving Momiji disgusted. Asahi says that now she feels bad for the sea cucumber and returns it to the ocean.

Mahiro realizes that was like bukkake, and notes that it was a little surprising due to her reaction.

## Characters

* Mahiro Oyama
* Momiji Hozuki
* Asahi Ōka

## Trivia

* The events of this chapter take place during the events of the previous chapter "Mahiro's Beach Fun (Part 2)", after the incident with Nayuta and before everyone goes home.
Midsummer Adventure

**Midsummer Adventure** (真夏の冒険, *Manatsu No Bōken*) is the thirty-first chapter of the *Onimai: I'm Now Your Sister!* anthology series. It is written and illustrated by Nekoume. It was originally published as part of Volume 2 of the anthology series on April 27, 2022.

## Summary

Miyo wears a pair of revealing lingerie she bought on a whim to get it out of her system.

## Characters

* Kaede Hozuki
* Miyo Murosaki

## Trivia

* This chapter is written and illustrated by Nekoume.
Onii-chan Energy

**Onii-chan Energy** (お兄ちゃんエネルギー, *Onii-chan Enerugī*) is the forty-second chapter of the *Onimai: I'm Now Your Sister!* anthology series. It is written and illustrated by Shunsuke Sorato. It was originally published as part of Volume 3 of the anthology series on January 7, 2023.

## Summary

Kaede helps Mahiro become much cuter as a surprise for Mihari.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Kaede Hozuki

## Trivia

* This chapter is written and illustrated by Shunsuke Sorato.
Mahiro and Asahi

**Mahiro and Asahi** (まひろとあさひ, *Mahiro to Asahi*) is the thirty-fourth chapter of the *Onimai: I'm Now Your Sister!* anthology series. It is written and illustrated by Shuji Yukimoto. It was originally published as part of Volume 3 of the anthology series on January 7, 2023.

## Summary

Mahiro decides to use Asahi to help her reclaim her masculinity.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Asahi Ōka
* Miyo Murosaki

## Trivia

* This chapter is written and illustrated by Shuji Yukimoto.
Mahiro and the Nobel Show

**Mahiro and the Nobel Show** (まひろとノーベルしょう, *Mahiro To Nōberu Shou*) is the eighteenth chapter of the *Onimai: I'm Now Your Sister!* anthology series. It is written and illustrated by Natsu Tadano. It was originally published as part of Volume 2 of the anthology series on April 27, 2022.

## Summary

Set during a time when Mahiro and Mihari were young kids, Mihari tries to wake Mahiro up to see her new invention.

## Characters

* Mahiro Oyama
* Mihari Oyama

## Trivia

* This chapter is written and illustrated by Natsu Tadano.
Mahiro and Schrödinger's Nayuta

**Mahiro and Schrödinger's Nayuta** (まひろとシュレディンガーのなゆた, *Mahiro To Shuredingā No Nayuta*) is the thirty-sixth chapter of the *Onimai: I'm Now Your Sister!* anthology series. It is written and illustrated by Suka. It was originally published as part of Volume 3 of the anthology series on January 7, 2023.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Momiji Hozuki
* Asahi Ōka
* Miyo Murosaki
* Nayuta Tenkawa

## Trivia

* This chapter is written and illustrated by Suka.
Mahiro's Yuri Manga

* English
* Japanese

**Mahiro's Yuri Manga** (まひろと百合漫画, *Mahiro To Yuri Manga*) is Part 2 of Chapter 34.5 of *Onimai: I'm Now Your Sister!*. It was originally published in Volume 12 of the doujinshi which was released on February 9, 2020.

## Summary

Mahiro checks out the Yuri manga that Miyo recommended.

## Plot

Shortly after getting crepes, Mahiro goes to her room and pulls out the Yuri manga that Miyo recommended to her at the bookstore. Mahiro decides to inspect the spoils and notes that she has high hopes for it, as it was picked out by an expert.

Mahiro opens it up, and finds herself getting aroused. She realizes that this is just another genre of eromanga, and is amazed that Miyo is into this stuff. She notes that Yuri manga really delivers.

## Trivia

* The events of this chapter occur shortly after the events of the previous chapter "Asahi's Crepe" while referencing when Miyo recommended Yuri manga to Mahiro in "Mahiro and the Adults Only Section".
Minato Senkawa

* Anime
* Manga

### Occupation

Middle School Student at Yotsuba University Affiliated Junior High School:* Class 1-B (Start of series - Chapter 38.5)
* Class 2-B (Chapter 39 - Present)

### Family

Kanata Senkawa (sister)
Mrs. Senkawa (mother)

## Anime

### Voiced by

Rika Abe

**Minato Senkawa** (千川 (せんかわ)  みなと, *Senkawa Minato*) is a middle school student at Yotsuba University Affiliated Junior High School, classmate of Mahiro Oyama, and the best friend of Yuta Sakurada. He is voiced by Rika Abe in the anime series.

## Personality

Minato is a middle-school aged boy who loves playing video games, just like his best friend Yuta. Both boys are also in love with Mahiro Oyama who shares their interest, though neither is aware of her true identity. The two have a longstanding desire to go out with Mahiro, and there appears to be an unspoken agreement between the two that they would each be happy with the other if one of them gets to date her.

For a long time, there was not much in the way to differentiate the two in terms of personality. However, it has been shown that Minato has a repressed feminine side as he actually didn't want to stop being a maid when the cultural festival was over and uses female avatars in the games he plays.

## Early Life

During grade school, Minato was in the same class as Momiji Hozuki, Asahi Ōka, Nemu Fujimi, Nodoka Fushimi, Aoi Tachikawa, Akira Nakai, and Yuta Sakurada. At some point later, he and Yuta played a game of soccer with Momiji and Asahi where Yuta acted as his team's goalie. Asahi scored the winning kick despite Yuta's best attempts to stop it. Despite this, he and Yuta didn't let losing get them down.

Eventually, Minato got into Yotsuba University Affliliated Junior High School ending up in Class 1-B.

## Etymology

* The name **Minato** means "harbor" (港) (**minato**).
* The name **Senkawa** means "thousand" (千) (**sen**) and "river" (川) (**kawa**).

## Appearances

### Manga

* Mahiro's First Day
* Mahiro's Difficult Class
* Mahiro and Conversation
* Asahi and Momiji
* Mahiro and the Allure of Bare Legs
* Mahiro on Valentine's Day
* Mahiro and the Adult's Only Section
* Mahiro Pretties Up
* Mahiro's Big Secret (Part 1)
* Mahiro and the Perfume
* Mahiro and Visitation Day
* Mahiro and Swim Class (Part 1)
* Mahiro, the Sun, and the Northern Wind
* Girls and Boys
* Mahiro and the Midsummer Romance
* Mahiro's Second Semester Debut
* Mahiro and the Charming School Festival (Part 1)
* Mahiro and the Charming School Festival (Part 2)
* The Boys' Shift Change
* Mahiro's Field Day
Perfect Onee-chan

**Perfect Onee-chan** (パーフェクトお姉ちゃん, *Pāfekuto Ojichan*) is a special chapter of *Onimai: I'm Now Your Sister!*. It was originally published exclusively in the Good Night Onii-chan! doujinshi included with the special edition of Tankōbon Volume 7 which released on January 31, 2023.

## Plot

On a Sunday morning, Kaede lies in bed with a large smile on her face. Momiji opens the curtains in Kaede's room telling her that's moring, but Kaede refuses to move saying that it's Sunday. Momiji tells Kaede that she can be very lazy sometimes, and Kaede says that everything is done in moderation.

Kaede appears to rise from under the covers, and Momiji asks her if she's finally awake. All of a sudden, Kaede encases Momiji and herself in her blanket, much to Momiji's surprise. Kaede suggests to Momiji that they warm up together, and Momiji notes that Kaede is acting like such a baby. Momiji doesn't fight it though, and soon enough the two asleep together under the covers all cozy.

Some time later, the doorbell rings and Momiji gets up believing it to be a delivery. As she walks away, Momiji tells Kaede to make sure to get out of bed. Kaede refuses, and calls out to Momiji. When Momiji doesn't come back, Kaede ends up pouting.

The doorbell rings again and Momiji tells whoever's there that it'll just be a sec. Looking through the doorbell camera, Momiji notes that it's just Asahi. When Momiji opens the door, Asahi tries to pull her out saying that they should play. Momiji says that they will, but tells Asahi to just come in for now.

Hearing Asahi's voice causes Kaede to suddenly wake up.

As they walk down the hallway, Asahi suggests to Momiji that they do some pro-wrestling, an idea that Momiji declines.

Asahi opens the door to Kaede's bedroom, and finds her fully-dressed, with her hair and makeup done, sipping a cup of tea. Kaede says good morning to Asahi, leaving Momiji and Asahi astounded.

Asahi says that Kaede always looks so mature, while Momiji laughs at how quickly Kaede was able to get ready. Kaede sniff her tea and breathes a sigh of relief that Asahi didn't catch her with her hair down.

## Characters

* Kaede Hozuki
* Momiji Hozuki
* Asahi Ōka

## Trivia

* Asahi references the adult magazine she found in "Asahi and Nii-chan" by suggesting that she and Momiji do some pro-wrestling which is what her brother Yuya claimed the magazine was about.
* Kaede unintentionally references how she doesn' like unexpected company as she doesn't like anyone outside her family seeing her with a lazy-day look, a fact that was previously seen in "Mahiro the Patissier".
Kaede and the Junior High Girls

* English
* Japanese

**Kaede and the Junior High Girls** (かえでとJC, *Kaede To JC*) is Part 2 of Chapter 56.5 of *Onimai: I'm Now Your Sister!*. It was originally published in Volume 19 of the doujinshi which was released on December 31, 2021.

## Summary

Mai and Miyako run into Mahiro and Momiji and meet Kaede for the first time.

## Plot

At the mall, Mai and Miyako get ice cream. They decide to take selfies and call the result perfect.

While sitting on a bench, Mai notices Momiji and Mahiro also getting ice cream. The girls go over to say hi with Miyako calling out to Momiji. Mahiro calls them the "fashion squad", and Momiji says hi to both of them. Miyako asks Mahiro and Momiji if they're out on a date. Momiji says no to that, explaining that they are with a few others.

Kaede comes over and asks Momiji about Mai and Miyako. Mai and Miyako are blown away by Kaede, especially as she says hi to them. Momiji tells Mai and Miyako that Kaede is her older sister, with Miyo adding that Kaede just helped them pick out new swimsuits.

Mai and Miyako get fired up by the fact that Momiji has such an attractive older sister. They asks Kaede to help them pick out new swimsuits as well, much to Kaede's surprise. The two girls begin chatting it up with Kaede while Momiji looks on.

Mahiro notes that Kaede has a certain magnetism, and Momiji nervously says that she guesses so, while at the same time being secretly pleased.

The next day at school, Mai and Miyako look over Momiji from afar. Mai notes that Momiji has the makings of greatness for sure, with Miyako noting that Momiji is just one makeover away from true hotness. Momiji is confused by their actions, but it is clear that the two have reevaluated Momiji's strengths.

## Characters

* Mahiro Oyama
* Kaede Hozuki
* Momiji Hozuki
* Miyo Murosaki
* Mai Yasaka
* Miyako Nagase

## Trivia

* The events of this chapter take place during "Mahiro and the Strategy Meeting", after the girls buy bathing suits and before Mahiro returns home.
Mahiro and the Strange Head

**Mahiro and the Strange Head** (まひろと変な頭, *Mahiro To Hen'na Atama*) is the fifty-first chapter of the *Onimai: I'm Now Your Sister!* anthology series. It is written and illustrated by Shigure Tokita. It was originally published as part of Volume 4 of the anthology series on November 27, 2023.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Momiji Hozuki
* Asahi Ōka
* Miyo Murosaki
* Nayuta Tenkawa
* Nemu Fujimi
* Satsuki Tadaka
* Mari Nishinomiya

## Trivia

* This chapter is written and illustrated by Shigure Tokita.
Good Night Onii-chan!

**Good Night Onii-chan!** (お兄ちゃんはおやすみ！, *Onii-chan wa Oyasumi!*) is a spin-off doujinshi volume of *Onimai: I'm Now Your Sister!*. It was orginally bundled with the special edition of Tankōbon Volume 7 which was released on January 31, 2023.

## Trivia

* Despite being a part of the Tankōbon subseries, the booklet and its chapters have not recieved an official English translation.
Oshimaen

**Oshimaen** is an amusement park in Onimai. Mahiro Oyama and Mihari Oyama visited the park as children, and later visited it again many years later as Mahiro's birthday present to Mihari.

## History

Mahiro and Mihari visited the park with their mother as children when Mihari was seven years old. During the visit, Mahiro won Mihari a stuffed "Oshima" plush toy and gave it to her, which made her extremely happy. Later in the day, she got separated from them and started to cry until Mahiro found her again.

In "Mahiro and the Gifted Experience", Mahiro decides to bring Mihari back to the park as a birthday present after a suggestion from Kaede. There, they spend the day enjoying the rides and other events, though they note the lack of attendees and suspect that the park has fallen on hard times. Mahiro even plays the same shooting game and wins Mihari another (albeit different) "Oshima" plush toy. When they are exhausted, Mahiro notices an arcade on the park grounds. While inside, she pays for a photobooth game that the two of them can use. Afterwards, Mihari cries tears of happiness at the picture, noting that it's not fair, as one can't buy such happy memories.

In "Mihari and the Stuffed Animal", Mihari thinks about the first time they visited the park, and notes that Mahiro's good attitude towards her hasn't changed even after all these years.

## Trivia

* As noted in "Mahiro and the Gifted Experience", the name of the park is taken from the Japanese title of the series *Onii-chan wa Oshimai!*, with "-en" added onto it, which means "park". It is also a reference to Toshimaen, a once-existed amusement park in Japan.

## Appearances

### Manga

* Mahiro and the Gifted Experience
* Mihari and the Stuffed Animal
Mahiro and Follow-up

**Mahiro and Follow-up** (まひろと経過観察, *Mahiro To Keika Kansatsu*) is the fourth chapter of the *Onimai: I'm Now Your Sister!* anthology series. It is written and illustrated by Taku Kawamura. It was originally published as part of Volume 1 of the anthology series on May 27, 2021.

## Summary

Mihari discretly observes Mahiro after laying out some outfits for her.

## Characters

* Mahiro Oyama
* Mihari Oyama

## Trivia

* This chapter is written and illustrated by Taku Kawamura.
Mahiro and Minorities

**Mahiro and Minorities** (まひろとマイノリティ, *Mahiro To Mainoriti*) is the third chapter of the *Onimai: I'm Now Your Sister!* anthology series. It is written and illustrated by Natsu Tadano. It was originally published as part of Volume 1 of the anthology series on May 27, 2021.

## Summary

Mahiro notices something off about her friends after she pulls an all-nighter on a game.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Momiji Hozuki
* Asahi Ōka
* Miyo Murosaki

## Trivia

* This chapter is written and illustrated by Natsu Tadano.
Mahiro's Colorful Life

* English
* Japanese

**Mahiro's Colorful Life** (まひろとからふるな日常, *Mahiro To Karafuru Na Nichijo*) is a special full-color chapter of *Onimai: I'm Now Your Sister!*. It was originally published exclusively in Volume 6 of the manga which was released on April 22, 2022 in Japan, and October 25, 2022 in North America.

## Summary

Mahiro reflects on how colorful her life seems now since she was transformed into a girl.

## Plot

One morning, Mahiro wakes up and yawns, noting that she woke up before her alarm went off today.

As Mahiro heads downstairs, she notes that today feels like a good day and notes that there's something special about it. Mahiro says good morning to Mihari, who says good morning back.

The two siblings eat their breakfast with smiles, and Mihari sees Mahiro off as she heads off to school with her friends. As Mahiro walks to school, she notes the life she had shut in her room was drab, grey, and lifeless. But that ever since she became a girl, everything seems so vibrant and colorful.

Mahiro takes a good look at herself and realizes that it really is colorful. Nayuta points out that they are in the opening color pages after all. Momiji tells the two not to suddenly go all meta on them.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Kaede Hozuki
* Momiji Hozuki
* Asahi Ōka
* Miyo Murosaki
* Nayuta Tenkawa

## Trivia

* This is the first chapter of the manga to include full-color pages.
* This chapter is notable for its meta nature with plenty of fourth wall breaks, as Mahiro notices the color around her and Nayuta points out that they are in the opening color pages.
Makoto Kodaira

* Anime
* Manga

### Occupation

Middle School Student at Yotsuba University Affiliated Junior High School:* Class 1-B (Start of series - Chapter 38.5)
* Class 2-B (Chapter 39 - Present)

## Anime

### Voiced by

Saya Tanaka

**Makoto Kodaira** (小平 まこと, *Kodiara Makoto*) is a middle school student at Yotsuba University Affiliated Junior High School and a classmate of Mahiro Oyama. He is voiced by Saya Tanaka in the anime series.

## Etymology

* The name **Makoto** means:
	+ "sincerity" (誠) (**makoto**).
	+ "truth" (真, 眞) (**makoto**).
* The name **Kodiara** means "small" (小) (**ko**) and "flat" (平) (**diara**).

## Appearances

### Manga

* Mahiro on Valentine's Day
* Mahiro Pretties Up
* Mahiro and the Charming School Festival (Part 1)
* Mahiro's Field Day

### Anime

* Mahiro's Role-Playing Game
* Mahiro Ponders Boobs and Identity
* Mahiro Pretties Up
List of Onimai: I'm Now Your Sister! Chapters

The following is a list of chapters for the manga series *Onimai: I'm Now Your Sister!*.

**NOTE: CHAPTERS ARE LISTED IN ORDER BY PUBLICATION IN THE ENGLISH LANGUAGE VOLUMES. CHAPTERS THAT HAVE NOT BEEN RELEASED IN ENGLISH WILL BE LISTED AS "TBA" UNTIL THEIR OFFICIAL ENGLISH LANGUAGE RELEASE. BONUS CHAPTERS THAT HAVE NOT BEEN RELEASED IN ENGLISH WILL NOT BE LISTED HERE UNTIL THEIR OFFICIAL ENGLISH LANGUAGE RELEASE. DUE TO SOME SPECIAL CHAPTERS ONLY BEING RELEASED IN JAPAN, THOSE CHAPTERS WILL BE ORDERED ACCORDING TO THEIR RELEASE DATE, BEING PLACED AS CLOSELY AS POSSIBLE TO THE RELEASE DATES OF OTHER CHAPTERS THAT PROCEED IT.**
Neon

* Anime
* Manga

**Neon** is a shopping mall in Onimai. It is a main shopping area for Mahiro Oyama, Mihari Oyama, Kaede Hozuki, Momiji Hozuki, Asahi Ōka, Miyo Murosaki, and Nayuta Tenkawa.

## History

As seen in "Mihari's Wardrobe", Miharo once met up with Kaede in the mall to go shopping for clothes when they were both in middle school.

During the events of "Mahiro and the Girls' Day Out", Mahiro and Mihari come here to see a movie (*My Name* in the manga, *Titanic in Space* in the anime). There, they meet up with Kaede and spend several hours shopping before the movie starts. Right when Mahiro thinks they are done, Kaede remembers that she needs a new swimsuit and they head up to a store to try them on. Kaede, Mihari, and (reluctantly) Mahiro try on and buy their own swimsuits. Afterwards, they realize that they forgot about the movie. In the anime, they just make it just in time, while in the manga they miss it and agree to meet up again to see it another day.

In "Mahiro and Kaede's Secret", Mahiro tries to use the bathroom while seeing the movie, but doesn't make it due to a long line and wets herself in the stall. Kaede eventually notices that she's gone and finds her in this state. Kaede leaves to get Mahiro some clean underwear, and afterwards they return to the movie agreeing to keep the incident a secret.

In "Mahiro and the Seasonal Attire", Miyo takes Mahiro to the lingerie section of an unnamed clothing store in the mall so they can buy some full-cup bras; Miyo was excited that she finally had someone who could go with her now since Mahiro's bust was now large enough to wear them. Momiji, Asahi, and Nayuta had followed them, and left feeling dejected as they couldn't join in due to them still being flat chested.

In "Mahiro and the Strategy Meeting", Kaede takes Mahiro, Momiji, Asahi, Miyo, and Nayuta to the mall to pick out some new swimsuits for an upcoming trip to the beach. In the same swimsuit store, she helps each girl pick out a swimsuit that fits their bodies and caters to any preferences that they may have.

In "Nayuta's Swimsuit", Nayuta and Chitose return to the store to purchase the swimsuit that Kaede recommended to the former.

In "Mahiro's Masculine Ego", Mahiro and Mihari come to the mall to bum around. While there they visit an Oshima plush shop, Mahiro tries on several outfits at a women's fashion store on floor 2F, and the two get coffee at the Star Cafe. Shortly after, they run into Chitose and Nayuta who are alos on an outing. Mahiro and Nayuta split from the group to go to the arcade while Chitose notes how thankful she is to Mahiro for befirending Nayuta. Mahiro and Nayuta afterwards play a knock-out arcade game, which Nayuta wins much to Mahiro's disappointment. Mahiro afterwards plays a rhythm game called KiraPai.

## Trivia

* Neon is based on an actual Japanese company, AEON Co., Ltd.

## Appearances

### Manga

* Mahiro and the Girls' Day Out
* Mihari's Wardrobe
* Mahiro and the Seasonal Attire
* Mahiro and the Strategy Meeting
* Nayuta's Swimsuit
* Mahiro's Masculine Ego
Mahiro Rings in the New Year

Disambiguation page for Mahiro Rings in the New YearThe following is a list of links to pages that might share the same title.Please follow one of the disambiguation links below or search to find the page you were looking for if it is not listed. If an internal link led you here, you may wish to change the link to point directly to the intended article.
**Mahiro Rings in the New Year** may refer to:

* Mahiro Rings in the New Year (manga) - Chapter 30 of the *Onimai: I'm Now Your Sister!* manga series.
* Mahiro Rings in the New Year (anime) - Episode 9 of the *Onimai: I'm Now Your Sister* anime.
Mihari and Her Onii-Chan

* English
* Japanese

**Mihari and Her Onii-Chan** (みはりとお兄ちゃん, *Mihari To Oniichan*) is a bonus chapter of *Onimai: I'm Now Your Sister*. It was originally published exclusively in Volume 1 of the manga which was released on June 27, 2018 in Japan, and August 31, 2021 in North America.

## Summary

Mihari recalls discussing with Kaede in middle school about wanting a younger sister, and in the present day reflects on how much things have changed since she began her experiment with Mahiro.

## Plot

A few years ago, when Mihari and Kaede were first-year middle school students, the two say good morning to each other outside of school. Kaede asks about a new hairclip that Mihari is wearing on her middle bang, and Mihari tells her that her older brother gave it to her as a reward for doing well on a test. Mihari remarks that she'd better work hard on the next test as well, and Kaede realizes that Mihari really loves her older brother.

Mihari asks Kaede if she has any siblings, and Kaede mentions that she has a younger sister. Mihari remarks that that sounds wonderful and mentions that if she had a younger sister she would spoil her rotten and dress her up in all sorts of outfits. Kaede remarks that it only works like that if the younger sister likes the outfits you pick for her, mentioning how her sister is kind of a tomboy so she can't do that. Kaede does remark though that her sister still is awfully cute and that she bakes cookies and stuff for her sometimes.

Mihari is very excited by the fact that Kaede can cook and asks Kaede to teach her, to which Kaede agrees. Mihari suggests that they do it after school today, much to Kaede's shock. Mihari smiles and thinks to herself that her older brother is going to be so happy.

Back in the present day, Mihari is baking a batch of cookies. She remembers how eventually her kind older brother stopped making time for her, so she instead worked hard on academics and sports. She remarks that now things are different and takes the cookies out of the oven.

She goes into Mahiro's room and announces that she's made some cookies. Mahiro becomes happy and devours the entire tray, telling Mihari how good her cooking is. The sudden compliment causes Mihari to blush.

Mihari thinks to herself that now that her older brother is a girl, they talk a lot more just like old times, even though they've swapped places. She thinks that her project might already be a success.

Just as she thinks this, Mahiro remarks that she's stuffed and decides to take a nap, much to Mihari's shock. She tries to rustle Mahiro awake saying that if she sleeps right away she'll become a cow, but Mahiro, already half asleep, just makes a mooing sound in response.

Mihari remarks that complete rehabilitation seems to have a ways to go.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Kaede Hozuki
* Momiji Hozuki (mentioned)
Nemu's Summer Vacation

* English
* Japanese

**Nemu's Summer Vacation** (ねむと夏休, *Nemu To Natsuyasumi*) is Chapter 62.5 of *Onimai: I'm Now Your Sister!*. It was originally published in Volume 21 of the doujinshi which was released on May 5, 2022.

## Summary

What Nemu did during her summer break is revealed.

## Plot

One day during summer break, Nemu is walking through a department store. While there, she sees a freestanding hammock for only 5880 yen and immediately becomes intrigued.

She buys the hammock and sets it up outside in her yard, sleeping the summer away. Unbeknownst to her, the hot rays of the sun are burning her skin.

Later that night, when it's dark out, Nemu wakes up in a daze and realizes that she got a severe sunburn, which will eventually lead to her having a major tan by the start of the new year.

## Trivia

* This chapter not only shows what Nemu was up to during her summer break, but also how she got the massive tan that she unveiled during "Mahiro's Second Semester Debut".
* The ¥5880 that Nemu spends on the freestanding hammock is equivalent to $40.92.
Mihari's Lunch

* English
* Japanese

**Mihari's Lunch** (みはりとお弁当, *Mihari To Obentō*) is a bonus chapter of *Onimai: I'm Now Your Sister!*. It was originally published in Volume 8 of the doujinshi which was released on February 17, 2019.

## Summary

Mihari prepares lunch for herself and Mahiro.

## Plot

At 6 AM, Mihari wakes up and puts on an apron telling herself that it is time to make lunch. She notes that it's a hassle to prepare a boxed lunch every morning, but it's worth it since Mahiro is working hard in her own way as well. If she makes one for herself at the same time, she'll save on eating lunch out.

Looking at the final product, Mihari decides that she didn't make the side dishes colorful enough. Using her perfectionism, she decides to make the rice cute to add some visual appeal. The end result shows and image of Mihari on the left, Mahiro on the right, and a heart shape between them with the word "love" ("Mihari Loves Mahiro").

Mihari wipes her forehead in relief at being done, then realizes in horror that this could mistaken as a present for her boyfriend instead of her brother, meaning that she can't give this to Mahiro. She decides to instead swap it for her own.

She gives the swapped lunch to Mahiro who accepts it. Later, while eating it, Mahiro cheers over there being so much meat in the lunch, ignorant of sister's feelings.

At Mihari's university, Mihari can't bring herself to eat the "lovey" lunch in front of other people. Her faculty advisor Chitose Azuma looks on in confusion at Mihari's angst.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Momiji Hozuki
* Chitose Azuma

## Trivia

* This chapter was originally released as the second part of Chapter 24.5 in Japan, but was reclassified as a bonus chapter for its English Release.
Momiji's Massive Transformation!

**Momiji's Massive Transformation!** (もみじちゃん大変身！, *Momiji-chan Dai Henshin!*) is the thirtieth chapter of the *Onimai: I'm Now Your Sister!* anthology series. It is written and illustrated by Kaeru Oie. It was originally published as part of Volume 2 of the anthology series on April 27, 2022.

## Summary

Mahiro tries to dress Momiji up in a more girlish style, only for her to become enamored by the world of cosplay.

## Characters

* Mahiro Oyama
* Momiji Hozuki
* Yuta Sakurada
* Minato Senkawa

## Trivia

* This chapter is written and illustrated by Kaeru Oie.
Mahiro's Anime Time

* English
* Japanese

**Mahiro's Anime Time** (まひろとアニメタイム, *Mahiro To Anime Taimu*) is a special chapter of *Onimai: I'm Now Your Sister!*. It was originally published exclusively in Volume 7 of the manga which was released on January 7, 2023 in Japan, and July 25, 2023 in North America.

## Summary

In this special full-color chapter, Mahiro tries to decide what genre of anime she should watch next.

## Plot

Late one night, Mihari says good night to Mahiro and Mahiro reciprocates. Once she is sure that Mihari has left, Mahiro says that it's time for the fun to begin.

She decides that tonight she'll catch up on her anime backlog and begins scrolling through a bunch of options on her TV. There are so many choices available that Mahiro starts to wonder which genre she should go for tonight.

She considers watching a romantic comedy anime with a touch of fanservice, emboldied by images of Kaede and Miyo.

She also considers watching a suspenseful thriller that will keep you hooked, embodied by images of Mihari and Nayuta.

She also considers watching an invigorating fantasy battle epic, embodied by an image of Asahi.

She then notes that she thinks that her favorite genre of all is heartwarming, laid-back slice-of-life, embodied by images of her and Momiji.

Mahiro decides that there's only one cure for a stressful world; *Onimai*.

Before Mahiro can watch anything, Mihari suddenly barges in and tells Mahiro to go to sleep already.

## Characters

* Mahiro Oyama
* Mihari Oyama
* Kaede Hozuki
* Momiji Hozuki
* Asahi Ōka
* Miyo Murosaki
* Nayuta Tenkawa

## Trivia

* This is the second full color special chapter after "Mahiro's Colorful Life".