When the 23 years old hospitalized protagonist - Shuu Abe - wakes up, he finds himself in a strange underground world rampant with monsters he has never seen before. In front of our puzzled protagonist, appears a talking chipmunk who's a girl(?) called Tamiko. "Mister Hunter, let's squeak on to the surface together!" Says she as the two decide to work together to achieve their goal of escaping the labyrinth... (The Single weakling with the strongest job x a fluffy magical beast) An adventure of a unique pair has set its course!