ONIMAI: I'm Now Your Sister! - Season 1 - Eps 4: Mahiro's New Friend
Mahiro loses to Mihari in a video game, so he has to do the grocery shopping this week as punishment. As an unemployed, good-for-nothing shut-in, the task at hand is daunting, but he plucks up the courage and makes his way towards the supermarket. The size of the crowd, however, makes his resolve waver and Mahiro finds himself cowering outside the store entrance. It is then that a young boy (?) around his age, wearing a baseball cap, comes to the rescue and offers him a helping hand. Thanks to the boy's (?) help, Mahiro is able to buy the groceries he needs and is just about to head home, when Kaede suddenly shows up. Seemingly, out of nowhere.
About ONIMAI: I'm Now Your Sister!

Title: ONIMAI: I'm Now Your Sister!
First Air Date: 2023-01-05
Last Air Date: 2023-03-23
Status: Ended
Rating: 7.4/10 (from 42 votes)
Language: JA
Seasons: 1
Total Episodes: 12
Network: AT-X
Genres: Animation, Comedy
Production Companies: Studio Bind, EGG FIRM, Ichijinsha, TOHO, Hakuhodo DY Music & Pictures, AT-X, BS11, PIA Corporation, Pony Canyon, movic, Tokyo MX, Bit grooove promotion
Synopsis
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.
Cast

Marika Kouno
Mahiro Oyama (voice)

Kaori Ishihara
Mihari Oyama (voice)

Hisako Kanemoto
Kaede Hozuki (voice)

Minami Tsuda
Momiji Hozuki (voice)

Kana Yuuki
Asahi Ohka (voice)

Natsumi Hioka
Miyo Murosaki (voice)