The opening and ending theme songs have been revealed for the TV anime adaptation of Onimai: I’m Now Your Sister!, which is set to premiere in January 2023. Enko and Pmarusama perform the opening song “Identity Meltdown”, while Mariko Kono, Kaori Ishihara, Hisako Kanemoto and Kaede Hozuki (ONIMAI SISTERS) perform the ending song “Himegoto＊Crisisters”. Studio Bind is in charge of the production, with Shingo Fuji as the director. Watch the trailer:
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Besides performing the theme songs, the ONIMAI SISTERS are also the main cast for Onimai. It includes Mariko Kono as Mahiro Oyama and Kaori Ishihara as Mihari Oyama. Two more cast members were revealed in the first trailer, and they are Hisako Kanemoto as Kaede Hozuki and Minami Tsuda as Momiji Hozuki.
Nekotofu writes and draws the original manga, which originally started serialization online but is also being published in Ichijinsha’s Monthly Comic Rex magazine. Kodansha US licensed it in English, and they describe the story:
Mahiro Oyama was just a normal 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!
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Source: Toho Animation 10th Anniversary Stream, Official Twitter
©Nekotofu/Ichijinsha/Onimai Production Committee