Where can I read Onii-chan wa Oshimai!?

You can read all 211 chapters of Onii-chan wa Oshimai! online free on XOmanga.

Is Onii-chan wa Oshimai! finished?

Onii-chan wa Oshimai! is currently ongoing.

How many chapters does Onii-chan wa Oshimai! have?

Onii-chan wa Oshimai! has 211 chapters available to read on XOmanga.

When was Onii-chan wa Oshimai! last updated?

Onii-chan wa Oshimai! was last updated in May 2026.

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Onii-chan wa Oshimai!

Ab sofort Schwester! · お兄ちゃんはおしまい! · ONIMAI: I'm Now Your Sister!

OngoingComedy Genderswap School Life Slice of Life Web Comic

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Updated May 2026Latest chapters by daily multivitamin

Onii-chan wa Oshimai! is an ongoing Comedy, Genderswap, School Life manga (2017). Read all 211 chapters online free on XOmanga.

Mahiro Oyama was just a normal erotic-game loving dude...until he woke up one morning as a woman! Turns out his mad-scientist little sister, Mihari, tried out one of her new experiments on him...with a disastrous outcome, as far as Mahiro's concerned! But Mihari is as determined to study him as he is determined to go back to his shut-in, game-playing life, and one thing's for sure...life is going to get a whole lot weirder from here on out! *5th place of Tsugi Manga Awards, Category Webmanga Retail: (Direct Retail From the Mangaka) Official Melon Books Official Toranoana Official DLSite (jp)

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About Onii-chan wa Oshimai!

Where can I read Onii-chan wa Oshimai!?: You can read all 211 chapters of Onii-chan wa Oshimai! online free on XOmanga.
Is Onii-chan wa Oshimai! finished?: Onii-chan wa Oshimai! is currently ongoing.
How many chapters does Onii-chan wa Oshimai! have?: Onii-chan wa Oshimai! has 211 chapters available to read on XOmanga.
When was Onii-chan wa Oshimai! last updated?: Onii-chan wa Oshimai! was last updated in May 2026.