One Turn Kill Sister in Another World

is a Japanese web novel series written by Konoe. It began serialization online in December 2019 on the user-generated novel publishing website Shōsetsuka ni Narō, and finished in June 2023.

A manga adaptation illustrated by Kenji Taguchi was serialized online via Shogakukan's Sunday Webry website, as well as the seinen manga magazine Monthly Sunday Gene-X, from March 2020 to July 2023.

An anime television series adaptation by Gekkō aired from April to June 2023.

Plot
High school student Asahi Ikusaba, a RPG video game otaku who has always dreamed of adventuring in another world, gets his wish when he is rendered comatose after getting hit by a car while saving a child. Suddenly finding himself in a fantasy world, he pursues his desire to become an adventurer, but finds himself outmatched by high-level monsters he stumbles across on his very first quest. Suddenly, his overprotective older sister Maya appears and saves his life. Partnering up with him, the two begin to make their way in this new world, even though Asahi comes to fear his sister's overbearing affection for him more than the various dangers this world has to offer.