Joseph, someone whose profession was founded on escaping the reality of life by choosing the path of a gamer, had a brother who, through an accident, was declared brain-dead. Finally, after reaching the end of the same game that had led to his brother's accident, he found a clue to the reason for such an event. However, it appeared as though reality was still far more real than fantasy, directly throwing him into a situation where he needed to kill his uncle on the same day he exited his game, just because he had killed his brother, who at least had a heartbeat. In his last moments, as his world crumbled while holding the steering wheel of his car, which had now thrown his uncle's car directly off the bridge, he realized that the betrayal had come from someone very close to him. With nothing but emptiness, he ensured that he killed that traitor before he died, regrettably. But the next moment, he found himself in the same game world, where a world once ruled by mecha had now been replaced with beast taming by the same Excovian Race, which sought to prevent humans from growing and posing a threat by offering a distraction from the technologies that once stood against them. Having already played the game to the end and developed exoskeletons and mechas, Joseph chose the path of defeating the Excovian race, which held a technological advantage, but he chose a path of merging mecha and beast taming and creating a new era where beast tamers would be in mecha while taming beasts wearing exoskeleton armor.