Shin no Nakama Episode.0: Imadake Saikyou no Souryuu Kishi wa, Izure Musou no Imouto Yuusha wo Mamori Nuku

Gideon Ragnason was born with an extraordinary gift for the blade, possessing a level of swordsmanship that far surpassed those around him. Yet his true purpose was never personal glory. As the older brother of the destined Hero, he dedicated every waking moment to refining his abilities, preparing himself to stand as the ultimate shield for the younger sister who would one day carry the weight of humanity's salvation on her shoulders. That fateful day arrives sooner than expected when the forces of the Demon King launch a devastating assault on their peaceful homeland. Amidst the chaos and despair, Gideon—now a knight without peer—steps forward to rally the terrified villagers. Revealing that his sister, Ruti, is the prophesied Hero chosen to save them all, he ignites a spark of defiance in their hearts. "We are the army of the Hero! Therefore, what we direct at our enemies should not be fear, but the wrath of retribution!" With those words, the stage is set for a desperate battle. The intertwined destinies of a genius swordsman who dances through combat and a young girl awakening to her legendary power quietly begin to turn, forging a bond that will shape the fate of the world.