Nikola is just a village girl working at the inn...until the day dragons invade, and she meets Haga, a scholar of everything around him. He's a part of an elite society called "Seeker," created to address a series of maladies plaguing their usually peaceful world. But both Nikola and Haga have secrets they hide...ones that will change each other's very existence...

Floating in a certain ocean is an island called "EGU Island." The sole entertainment on this island is listening to the songstress, "End of the World." Day after day, the islanders are enchanted by her singing. However, this tranquil time is shattered in an instant. Since the disappearance of the songstress, the island has been filled with "anger," "doubt," and "anxiety." Various thoughts and intentions begin to stir...A licking war unfolds around, "End of the World!" The one who holds her destiny is the legendary legacy "EGUMI Legacy."

Prince Kinnikuman, who came to Earth from Kinnikusei, a planet at the end of the universe, was always ridiculed by humans as a useless Chojin. However, by chance, he was given the right to participate in the Chojin World Cup, a tournament to determine the world's best Chojin, and by a miracle, he won the championship. The following year, he even won it again! Since then, he has become a central figure among Seigi Chojin who protects the peace of the universe. He has managed to defeat the raging forces of the enemy, including Akuma Chojin who plans to rule the world, and Perfect Chojin who aims to wipe out the weak Chojin on Earth, with the power of friendship with his friends, including Terryman and Robin Mask. In recognition of his achievements, Kinnikuman wins the "Survival Match for the Kinnikusei Throne," the final test of his career, and is crowned the 58th Great King of Kinnikusei! He returned to his home planet from Earth, got married, and said goodbye to eight years of fighting. About a year and a half later, the entire universe was supposed to be at peace...

The year is 20XX. The ninja, who once forged the history of Japan, were scattered across the country during the Meiji Restoration. As these ninja mingled with the other clans, their bloodline thinned, and they gradually faded from sight. The descendants of these ninja clans, seeking to preserve their heritage, formed the WNA (World Ninja Association) in the hope of carrying on their legacy. And so it was that the WNA succeeded in developing Ninja-Gum, an art which could summon forth the strength of the Shinobi. And yet creating the most powerful Ninja-Gum requires the strongest of ninja DNA. So it was that the Ninjala Tournament was held, that the mightiest of all ninjas could be found...