A teaser trailer and main visual for My One-Hit Kill Sister, which is due to premiere sometime in 2023, have been released. More cast details for the anime adaptation were also revealed.

The additional cast includes Rio Tsuchiya as guild receptionist Tanya, Azumi Waki as the healer Sophie, Sora Tokui as the aristocratic adventurer Gloria, Konomi Kohara as Gloria’s maid Kuon, and Yuuma Uchida as Siegfried. Tanya, Sophie, Gloria, and Kuon are shown in the background of the main visual, while main characters Asahi Ikusaba (Yuuki Sakakihara), Maya Ikusaba (Haruka Shiraishi), and Kilmaria (Ami Koshimizu) get the spotlight in both the visual and trailer.

My One-Hit Kill Sister is based on the Shogakukan-published manga written by Konoe and illustrated by Kenji Taguchi, which is serialized on Sunday Webry and published under the Shonen Sunday Comics label. The manga began in 2020 and will release its eighth tankoubon volume on August 12. The manga is based on Konoe’s Shousetsuka ni Narou web novel that began in 2019.

The premise of My One-Hit Kill Sister involves the boy Asahi ending up in another world after an accident. He tries to enjoy this new world, but discovers that he is horribly weak. On the other hand. his brocon sister Maya, who was reborn in the same world after striking her head while chasing Asahi, possesses the strongest ability of this world.

Hiroaki Takagi (Love After World Domination, Komi Can’t Communicate, and Orient episode director and storyboarder) is directing the show with Ryouhei Kashii (Battle Athletes Victory ReSTART!) as series composer and Yuuji Hamada (The Gymnastics Samurai animation director, Kase-san co-prop designer) as character designer, Kenichi Kurata (Aharen–san wa Hakarenai) as art director, Atsushi Tamura (The Dawn of the Witch) as photography director, and Ryouta Katsuta (I’ve Somehow Gotten Stronger When I Improved My Farm-Related Skills) and Maki Yamamoto (I’ve Somehow Gotten Stronger When I Improved My Farm-Related Skills) as color designers. Gekkou is producing the show.

Crunchyroll has announced that it will stream the anime.

Sources: NIkkatsu Anime Channel, @onekillsister