Tenkuu Senki Shurato

During the final match of a martial arts tournament, a 16-year-old named Shurato and his friend Gai are pulled into a massive ball of light. After regaining consciousness, they find themselves on a mystical celestial sphere with a sacred atmosphere. It is revealed that Shurato was once the ruler of this world and has now returned to his original form. Shurato is surprised when Gai becomes hostile toward him. Following this event, a dramatic and extraordinary story unfolds between the two.