/anime/117419/oniichan-wa-oshimai-
Cover Art

    Oniichan wa Oshimai!  

    Onimai: Im Now Your Sister!, Onii-chan is Done For, お兄ちゃんはおしまい！, Onimai: I'm Now Your Sister!, Onimai, Onii-chan wa Oshimai!, Onii-chan is Done For!

    Mahiro Oyama was an individual who enjoyed playing erotic games. However, everything changed when he woke up one morning as a woman. It turned out that his sister, Mihari, had conducted an experiment on him with unforeseen consequences. Despite the challenges, both Mahiro and Mihari were determined to continue their research. As for the future, it was clear that life would become even more bizarre.

    Oniichan wa Oshimai! was released on Blu-ray in two boxes from April 19, 2023, to June 21, 2023.

    ComedyShounenSlice of LifeSchoolEcchiCGDCTMagical Sex Shift
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    Tags
    Coming of Age
    Family Life
    Age Regression
    Female Protagonist
    Cute Girls Doing Cute Things
    Nudity
    School
    Gender Bending
    Primarily Female Cast
    Primarily Teen Cast
    Rehabilitation
    Tomboy
    Iyashikei
    Otaku Culture
    Chibi
    Gyaru
    Hikikomori

    Show Spoilers(1)
    Grade
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    Soundtrack
    Characters
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    Leonardo
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    Mahiro Oyama
    Cover of Characters
    Mihari Oyama
    Cover of Characters
    Asashi Ouka
    Cover of Characters
    Miyo Murosaki
    Cover of Characters
    Momiji Hozuki
    Cover of Characters
    Kaede Hozuki
    Related works
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    Oniichan wa Oshimai!
    Authors
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    Takashi Jinguuji
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    Nekotoufu
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    Yutaka Nakamura
    Cover of Authors
    Mai Yoneyama
    Cover of Authors
    Hitomi Kariya
    Cover of Authors
    Kou Yoshinari
    Cover of Authors
    Akio Watanabe

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