Senyu.

One day, a massive hole tears open in the world, unleashing demons upon the land. The king fears this signals the return of the demon king Rukimedesu, who was sealed away a thousand years ago by the hero Kureashion. To face the threat, the king calls upon the hero’s descendants-and seventy-five answer the summons. Among them is the forty-fifth claimant, Aruba, who reluctantly teams up with Ross, a cruel palace warrior. Together, their journey begins.