Onii-chan wa Oshimai! Wiki

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Dedicated to fans of Onimai: I'm Now Your Sister! also known as Onii-chan wa Oshimai!

At present, the Wiki only covers material and characters from the six volumes, but more is intended to be added in the future once additional chapters are published in North America.

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.

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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