
お兄ちゃんはおしまい!
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! (Source: Kodansha USA)
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! (Source: Kodansha USA)

Anime locations in Japan
お兄ちゃんはおしまい!
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! (Source: Kodansha USA)
Pilgrimage guide on this page
Real-world location guide
OtakuTrips lists 1 published real-life location connected to ONIMAI: I'm Now Your Sister!, in Yamagata. Key spots include 山形県尾花沢市. Use the map and location pages below to see where they are. We do not infer a setting beyond the catalog data.
This page documents 1 published real-world location connected to ONIMAI: I'm Now Your Sister!. Each location page identifies the place using the information stored in the OtakuTrips database.
The published location pages provide maps and available access information. Visitors should follow local rules and respect private property.
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Photo by ブルーノ・プラス (CC BY 4.0) via Wikimedia Commons
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Travel map
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After the trip
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