The lore recounts the stories of Excalibur - a hallowed sword that endows exceptional might upon the deserving, thereby conferring upon them the status of Arthur. However, divine intervention results in the creation of several Excaliburs, leading to disruption of the natural temporal hierarchy. To re-establish equilibrium, a group of six Arthurs - namely Danchou, Renkin, Kakka, Yamaneko, Tekken, and Rurou - undertake a journey back in time to the era when the anomalous Excaliburs first manifested. Their objective is lucid - to annihilate each of the million Excaliburs that were forged in the past.