My One-Hit Kill Sister

After a real-world accident, Asahi Ikusaba finds himself in a fantasy world, eager to enjoy his new surroundings. However, he soon discovers that his skills are incredibly weak. Just as a fierce monster is about to attack him, his beloved older sister, Mayu, intervenes. Mayu, who has followed Asahi into this world, possesses extraordinary skills and cheats, making her the strongest in this new realm. Thus begins a quirky fantasy tale featuring a sister with a protective, almost obsessive, love for her younger brother and a brother who struggles with his incompetence. Their dynamic promises both humor and adventure as they navigate this strange world together.