Isekai One Turn Kill Nee-san: Ane Douhan no Isekai Seikatsu Hajimemashita
異世界ワンターンキル姉さん ～姉同伴の異世界生活はじめました～
Ikusaba Asahi is an ordinary high school boy who is accidentally transported to a magical fantasy world. Asahi is ready to have a good time using his knowledge of games and isekai stories to thrive in this new world, but it turns out that his skills are entirely too weak, especially compared to his doting elder sister, Ikusaba Maya, who arrived in the new world with the most powerful cheat skills imaginable.