Workaholic assistant Atobe Arihito fell asleep in his company's bus that
was traveling for a vacation. When he awoke he learned he had died due
to the bus getting into an accident, and that he had reincarnated into a
world of reincarnators - to the Labyrinth Country. To his surprise he
was discovered by his slave driving manager, Igarashi Kyouka, who
further explains their role in this world.
In Labyrinth Country,
Reincarnators are expected to choose a job and form parties to fight
against monsters in Labyrinths. "Valkyrie" Kyouka had expected Arihito
to work with her once again, but he declines due to his knowledge of her
demanding nature. As they depart she vows to make him regret not
choosing her. And thus starts Arihito's adventure as a "Rear Guard".
