Operation Han-Gyaku-Sei Million Arthur

Legends tell of Excalibur, a holy sword that chooses only those fit to bear its power, granting them immense strength and the title of Arthur. But a divine anomaly produces countless Excaliburs, throwing time itself out of alignment.

To restore history, six Arthurs—Danchou, Renkin, Kakka, Yamaneko, Tekken, and Rurou—are dispatched to the moment the aberrant swords first appeared. Their mission is as straightforward as it is impossible: eliminate the Excaliburs of the past—one million in total.