(from the publisher)Start at the beginning of the manga adaptation of the acclaimed anime series! Living in a sunless cave, Simon drills holes to expand his village’s underground domain. One day he discovers a small glowing drill-bit and the man-sized mech it activates. Simon and his new mech are dragged into a plot to break through to the surface, facing giant monsters, cave-ins, and beastmen! Get ready for buxom babes, beastmen, and giant mechs as only GAINAX can provide them!