"Can you believe it? When I was transported to another world, my sister turned out to be the strongest one there!"
After an accident in the real world, Asahi Ikusaba finds himself in a new and exciting world. However, his abilities pale in comparison to his sister's. When facing a deadly monster, it's his elder sister Mayu who comes to his aid and saves him.
Mayu follows her brother to this new world in search of his love and discovers she has incredibly powerful skills. Thus begins the epic tale of a brother with weak skills and a sister with all the cheats in a fantastical world.
