Ultraman: A Poor Student of the Land of Light, Jack's Adopted Son?

(Ultraman universe, no System, no heroine, Ultraman protagonist)

The human host appears midway through the story and is not the protagonist.

As a senior officer in the Land of Light's Space Garrison, Ultraman Jack has earned a fearsome reputation among the forces of evil through his distinguished service and formidable strength.

With no children of his own, he adopted Jereks Ultraman, the orphaned child of a comrade who died in battle.

However, as Ultraman Jack's adopted son, Jereks has some resentment toward the title of “Ultra Warrior” for certain reasons. He is even unwilling to give his all during the Ultra Warrior examinations. If Ultraman Jack had not given him an exceptional promotion, Jereks would have spent his life as an ordinary citizen of the Land of Light.

(When Tartarus launched his first attack on the Land of Light)

As Tartarus attacked, he was struck by a being from a parallel universe who went by the name “Etifir Ileyes.” The latter used an incomprehensible “computational strike” to forcibly scramble the timeline, permanently depriving Tartarus of the chance to attack the Land of Light.

Instead, the Land of Light found itself facing an assault from the Etifir family.

Jereks, too, encountered the Etifir main force during a low-risk mission. Caught up in a “computational strike,” he was forced to travel to an unknown “Earth.”

Across different universes and eras, Jereks will encounter other aliens and humans, and embark on a story of his own.

And he will come to understand what it truly means to be an “Ultra Warrior”...