Gaeshi is a planet inhabited by an all-male race. It is an Earth-sized planet located in the North Galaxy not too far away from Earth (only an 18-hour ride).
The first Gaeshians performed cannibalism on each other, and only one of them remained. But when they fought, they did it in a strange fashion. The modern name for this type of fighting is called Dueling. Dueling is fighting against one opponent, in a duel area given. Each fighter takes turns simultaneously, trying to defeat the other side. Rules are: If one fighter steps off the battlefield, the duel is over. Fighters can only use their powerful techniques for a very limited count. A duel has only 20 turns, if it is a draw, the one with most damage done to his opponent wins.