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Onii-chan wa Oshimai! Wiki

Nekotofu (ねことうふ, Nekotoufu) is a Japanese mangaka who is best known as the creator of the Onimai: I'm Now Your Sister! manga series. He has also worked on additional series such as the ongoing Niwasaki Diary, and the canceled series Idol Stuff.

Personal Life[]

Nekotofu was born on December 20 of an unknown year in Wakayama Prefecture in Japan. As an adult, he currently resides in Nerima Ward, Tokyo.

According to Nekotofu, he has had a lifelong interest in gender-bender anime/manga series. Specific examples that he has enjoyed include Ranma 1/2, Kashimashi: Girl Meets Girl, and Idol Pretender.

He graduated from Chiben Gakuen Wakayama Junior and Senior High School. He also attended the Faculty of Engineering Science at Osaka University, but dropped out before graduating.

Career[]

Early Work[]

Nekotofu began his career as a mangaka in 2004, mostly focusing on fan works and doujinshis based on series such as Idol Master, Touhou Project, Puella Magi Madoka Magica and other series.

In 2016, Nekotofu created a one-shot doujinshi called My Strange Sister, which featured gender-bender elements. The positive reception that this doujinshi recieved, along with the release and popularity of the 2016 Japanese anime film Your Name (which also features gender-bender elements) gave Nekotofu the inspiration and confidence to create his own unique gender-bender series.

Onimai: I'm Now Your Sister![]

In January 2017, Nekotofu began the serialization of Onimai: I'm Now Your Sister!, self publishing it on his Pixiv account, and later on Niconico Seiga where it became significantly more popular.

In early 2018, Nekotofu received an invitation from a friend who worked at a Drama CD production company, and thought that a full-fledged doujin drama CD, which was still rare at the time, would also be a way to promote the work. In addition, in an interview with Harumi Inaka, Nekotofu said, "Since it's an original work, I want to develop it in various ways within my reach. With the help of a friend at the production company, I was able to make a full-fledged production with a gorgeous cast. I was able to create something that is unique." Director Takumi Kodama submitted candidates for casting, and Nekotofu selected based on their own preferences, having already been a particular fan of Marika Kōno.

According to the chapter "Real Record! Drama CD Report", Nekotofu was present for the recording of Drama CD and gave input on the performances of the actresses selected to voice the characters of Mahiro Oyama, Mihari Oyama, and Kaede Hozuki. The Drama CD series would continue to record new material for infrequent releases until 2020 before going on hiatus until 2024.

In April 2019, the manga began serialization in Ichijinsha's Monthy Comic Rex magazine. Nekotofu has worked out a deal with Ichijinsha that allows him to continue to self publish doujinshi based on the series as well as release each monthly chapter for free on his various online accounts on Pixiv and Fanbox.

Nekotofu had long expressed an interest in having anime adaptation of the manga produced, and had begun pitching the concept to several anime companies. The onset of the COVID-19 Pandemic put a halt to these plans however, without any potential deals being made. The onset of the pandemic also caused the production of the Drama CD series to come to a halt due to an inability to get the actors together to record.

Nobuhiro Osawa, learned of the existence of the manga at an internal meeting of EGG FIRM, where he is the representative director, and around May 2020, through an agent at Ichijinsha, he contacted Nekotofu to pitch creating an anime based on the manga. Nekotofu readily agreed to this, and the project to make an anime version of this work began. The characters of Mahiro Oyama, Mihari Oyama, Kaede Hozuki, and Momiji Hozuki, were voiced by their same respective voice actresses from the Drama CD series as a special request from Nekotofu as a way of thanking them for their previous work. The characters of Asahi Ōka, and Miyo Murosaki (who had not appeared in the Drama CD series) were cast through a new audition that Nekotofu supervised. Nekotofu subsequently appears in the end credits sequence of the anime in the form of a cat hanging out with Mahiro, Mihari, Kaede, Momiji, Asahi, and Miyo.

The anime subsequently aired a single season of twelve episodes from January to March 2023. Nekotofu has spoken highly of the anime and has expressed his support for a second season, though as of February 2025 no follow ups have been announced.

Nekotofu continues to publish official chapters and doujinshi related to the series. One Main Chapter is released every month on Pixiv, with the chapter being released a week early for subscribers to his FANBOX account. He also publishes a Doujinshi Volume, which bundles three Main chapters with at least one exclusive 0.1 - 0.5 Chapter related to one of the included main chapters, every few months once the main chapters included have been published. In addition to this, he has also created chapters that are released exclusively in Collected Works Volumes and Tankōbon Volumes.

After speculation regarding the serious themes of Chapter 76 and Chapter 77 which suggested that the manga was hinting at a finale, Nekotofu clarified in the afterword of Doujinshi Volume 26 that he has no intention of ending the story anytime soon.

Trivia[]

  • Nekotofu's favorite food is Stingray Fin.
  • Nekotofu's blood type is "O".
  • Nekotofu's X/Twitter icon is a close up of a Giant Salamander.

Appearances[]

Onimai: I'm Now Your Sister![]

External Links[]


Onii-chan wa Oshimai! Wiki • Navigation
Characters
Main Characters Mahiro OyamaMihari OyamaKaede HozukiMomiji HozukiAsahi ŌkaMiyo MurosakiNayuta Tenkawa
Students Male Yuta SakuradaMinato SenkawaTakeshi HaijimaTomoya KibaMakoto KodairaHinata Tsukishima
Female Nemu FujimiSatsuki TakadaMinori ShiinaMai YasakaMiyako NagaseNodoka FushimiAoi TachikawaAkira NakaiMisao Nogata
Teachers Mari NishinomiyaRin MinakataYuriko Kitahara
University Chitose AzumaArika TachimiTsubasa Inui
Family Matsuri OyamaMr. OyamaKasumi HozukiYu ŌkaYuya ŌkaYomi MurosakiMr. NagaseMrs. SenkawaKanata Senkawa
Guild PontaShioriLucasRisachii
Other Characters Idol Stuff Hiyori HisakiRaika NanamiTsurara MiwatariMomiji HozukiChigusa Hitotose
Niwasaki Diary Anna NiwasakiMrs. Niwasaki
Others KeroriTruant OfficerGhost GirlNekotofu
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