Onii-chan wa Oshimai! Wiki

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This wiki is based off the manga/anime series Onimai: I'm Now Your Sister! also known as Onii-chan wa Oshimai!

This wiki was founded on January 7, 2023. We currently have  articles,  images, and Special:Statistics edits.

At present, the Wiki only covers material and characters from the first six volumes (as only those six volumes have been published in English), but more is intended to be added in the future once additional chapters are published in North America with official English Translations.

We use a formal style on this wiki, with an in-universe style of description. Please use existing infoboxes, and be sure to create redirects for chapters, characters, and episodes. Note that we are a fan-based wiki.

If there are any questions, get in touch with the wiki's admins. Other than that, happy editing.

We're a collaborative community website about that anyone, including you, can build and expand. Wikis like this one depend on readers getting involved and adding content. Click the "ADD NEW PAGE" or "EDIT" button at the top of any page to get started!

Introduction

The series follows Mahiro Oyama, an 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.

Characters



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