When lazy, erotic-game loving Mahiro Oyama is transformed into a girl by his younger scientist sister's experiments, he becomes determined to change back, only to recognize that with his new opportunity, he may want to turn his life around.
Unfortunately the series ONIMAI: I'm Now Your Sister! is not yet available on Disney Plus. Follow us on Facebook to see when ONIMAI: I'm Now Your Sister! becomes available on Disney Plus!
| Writing | Michiko Yokote | Series Composition |
| Directing | Shingo Fujii | Series Director |
| Visual Effects | Ryo Imamura | Character Designer |
| Sound | Daisuke Achiwa | Original Music Composer |
| Sound | Alisa Okehazama | Original Music Composer |
| Editing | Yuji Oka | Editor |
| Visual Effects | Makiko Doi | Color Designer |
| Camera | Akane Fushihara | Director of Photography |
| Sound | Takuya Hasegawa | Sound Effects |
| Sound | Marika Kouno | Theme Song Performance |
| Art | Masayo Kobayashi | Art Direction |
| Sound | Kohei Yoshida | Sound Director |
| Sound | Kaori Ishihara | Theme Song Performance |
| Sound | Pmarusama | Theme Song Performance |
| Sound | Hisako Kanemoto | Theme Song Performance |
| Sound | Minami Tsuda | Theme Song Performance |
| Sound | Enako | Theme Song Performance |
| Production | Asuka Yamazaki | Executive Producer |
| Visual Effects | miton | Lead Animator |
| Production | Atsushi Takahashi | Executive Producer |
| Production | Takurou Hatakeyama | Producer |
| Production | Nobuhiro Osawa | Executive Producer |
| Production | Katsuyuki Imai | Executive Producer |
| Production | Sosuke Asano | Executive Producer |
| Visual Effects | Kay Yu | Lead Animator |
| Production | Katsuhiro Takei | Executive Producer |
| Sound | Naomi Fujita | Sound Mixer |
| Production | Kazutaka Yamanaka | Executive Producer |
| Production | Katsuya Tasaki | Executive Producer |
| Visual Effects | Genki Uchiyama | Lead Animator |
| Sound | Yoshiki Kobayashi | Music Producer |
| Production | Fuminori Yamazaki | Executive Producer |
| Production | Hirotaka Kaneko | Executive Producer |
| Production | Norio Fukui | Executive Producer |
| Crew | Mitsuki Tsugioka | Special Effects |
| Production | Kazunari Okuma | Executive Producer |
| Art | Hiroshi Inoue | Assistant Director of Photography |
| Production | Ryu Takahashi | Executive Producer |
| Production | Keiji Ota | Executive Producer |
| Visual Effects | Yuki Matsuguma | Lead Animator |
| Production | Mitsuteru Hishiyama | Producer |
| Art | Masayuki Niitsuma | Art Designer |
| Crew | Nekotoufu | Creator |
