Comics created by Japanese cartoonist Mayumi Azuma, and TV animations and games adapted from comics. The world outlook of this work is based on the fantasy world, which is divided into many continents, and there are also villages or countries on each continent. Jihad angels become weapons against mankind. They can fight with ordinary weapons, or recite ancient songs to exert their extraordinary power. The main line is against an organization called Orr Kaynard, full of thrilling adventures. It belongs to the so-called RPG style fantasy adventure works. Different from the previous dominant combat mode, it emphasizes cooperation and communication more. Besides poetry, it also contains elements of modern science, such as guns, flying boat and ships.