The world of Leus has been written so far, which is a world where card masters use cards from one to nine stars. In the Black Dragon World, there are three major empires and hundreds of countries in the magical world. The world of Invincible Heroes is a world based on games. The apocalyptic world, a world that has entered the apocalypse due to infection caused by a virus. The whole French world. Monster world, a world of cultivating immortals. The world of science and technology is a game-like world where various weapons and equipment are made. Witch world. The world of demon beasts, the world of demon soul masters. The biochemical world started out as an ordinary biochemical world. In the later period, inspiration exploded, and elements such as vampires, Japan's Hyakki Night Parade, and the Eastern Kunlun appeared.
