The manga adaptation of Koneko's light novel series "My One-Hit Kill Sister" (Isekai One Turn Kill Nee-san) has reached its conclusion. The twelfth and final volume was recently released, marking the end of the story that began in March 2020 with the series' publication.

At the heart of the narrative is Asahi Ikusaba, a high school student who accidentally finds himself in an alternate world. Although he is familiar with video games and fantasy worlds, Asahi possesses no extraordinary abilities. However, he reunites with his older sister Maya, who has an overwhelming power and an excessive fondness for her younger brother.

The original novels were first published in December 2019 on the website "Shōsetsuka ni Narō" (Let's Be Novelists) and were completed this June. An anime adaptation aired earlier this year and was available for streaming on Crunchyroll while it was broadcast in Japan.