My One-Hit Kill Sister anime revealed a new visual earlier at the Crunchyroll Expo 2022. The anime will be streamed on Crunchyroll sometime in the future, but no concrete date was given. The anime was announced earlier this year, along with the 7th volume of the manga.
My One-Hit Kill Sister (Isekai One Turn Kill Nee-san) is a manga written by Kanoe and illustrated by Kenji Taguchi. The staff details for the anime haven’t been revealed yet. The manga started serialization in Shogakukan’s Sunday Web Every in 2020 and the full title is Isekai One Turn Kill Nee-san: Ane Douhan no Isekai Seikatsu Hajimemashita.
Sunday Web Every describes the plot as of the manga as:
Asahi Ikusaba, a high school student who wandered into another world, is trying to enjoy his new world with his knowledge of games and various isekai trivia. However, his abilities are too meager and he is struggling. He has no special overpowered ability, but what appeared in front of him one day was his sister, Mayo Ikusaba. Mayo had obtained the strongest cheat ability in the other world and is also a super-adorable person. Armed with the blessings of his overprotective older sister Asayo continues his life in another world…
© Kanoe, Kenji Taguchi/Shogakukan