Isekai One Turn Kill Neesan: Ane Douhan no Isekai Seikatsu Hajimemashita

When a truck accident abruptly ends Asahi Ikusaba's mundane life, he finds himself reincarnated in a fantastical new world, a classic setup for the ultimate power fantasy. There's just one catch: his doting older sister, Maya, has also been transported, and she's not just along for the ride—she's impossibly overpowered, capable of defeating any foe with a single, devastating blow. As Asahi tries to navigate this new reality, hoping to unlock his own hidden potential and become the hero he's always dreamed of, Maya's overwhelming strength and unwavering affection constantly pull him into her orbit. Their journey through this vibrant, perilous land is a hilarious and action-packed exploration of sibling bonds, unexpected power dynamics, and the true meaning of heroism when one sibling can literally erase any threat.

✦ AI-drafted summary