Different from the earth, there was a planet not yet discovered by mankind. It was known as the "Bora." In this planet, the world was different. Humans are to live in part, not like earth, not by race, but by what your personality is. Each group of parts were seperated and guarded by a castle. There is war, there is alliances, and there are particles that are yet not discovered. In the year 1821, a boy that had a personality of adventure and violence named Yusei Kirigaya was borned. Yusei l