Ichijinsha announced a television anime adaptation of Nekotoufu's Oniichan wa Oshimai! (Onimai: I'm Now Your Sister!) manga on Friday. The publishing company also opened an official website, revealing the main cast, staff, and a teaser visual (pictured).

Voice actresses Marika Kouno (Isekai wa Smartphone to Tomo ni.) and Kaori Ishihara (Irozuku Sekai no Ashita kara) are starring as Mahiro Oyama and Mihari Oyama, respectively.

Staff
Director: Shingo Fujii (Mushoku Tensei: Isekai Ittara Honki Dasu episode director)
Series Composition: Michiko Yokote (Jahy-sama wa Kujikenai!)
Character Design: Ryou Imamura (Yama no Susume Third Season opening animation director)
Production: Egg Firm
Studio: Studio Bind

Nekotoufu originally posted the comedy slice of life manga, also known by its short title Onimai, as a doujin on Pixiv in February 2017 before Ichijinsha picked it up for physical publication in June 2018. The manga began regular serialization in Monthly Comic REX in April 2019. The fifth volume went on sale last May, with the sixth volume scheduled for an April 27 release. Onimai has a cumulative 500,000 copies of its volumes in circulation.

Kodansha USA licensed the manga in English for digital release last June and published the fifth volume on March 22.

Synopsis
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)

Announcement


Official site: https://onimai.jp/
Official Twitter: @onimai_anime

Source: Comic Natalie

Oniichan wa Oshimai! on MAL