World's Strongest Rearguard: The Novice Seeker of Labyrinth Country (Associated Names)

A heavily overworked businessman takes a nap on a bus headed to a corporate retreat. He awakens in a fantastic labyrinth city, immediately being informed that he has been reincarnated after dying in a bus accident and must work as a dungeon seeker. Confused, the former businessman heads to the registration point to get his…