After a fatal accident, overworked office worker Arihito Atobe is reborn in the Labyrinth Country as a Seeker with the rare Rearguard class-an all-purpose support role that excels in attack, defense, and healing. Joined by a fierce demi-human mercenary and his former boss, Arihito dives into deadly dungeons and rises through the ranks. The adventure of the strongest support class begins!