RE: Zero -Starting Life in Another World-, Vol. 21 (Light Novel) (novel)

The Witch Cult has finally been driven from the Water Gate City, but the turbulent events have left deep scars. Far too many people have even been robbed of their very identities. In order to save them, Subaru and his friends set off on a dangerous journey to the Pleaides Watchtower.

To get there, they will need to cross the Auguria Sand Dunes, home to vicious demon beasts of every kind. But they have nothing to fear with their companions the Demon Beast Master, the twin sisters Ram and Rem, and the Finest of Knights Julius...right?