In another world, war is waged through battles of humanoid mechanical "Magic Suits." These suits are piloted with power called Ludea, intrinsic to each human from birth.
One day, Yuta and his whole high school class are summoned to fight. Why? "People from Earth have high Ludea Rates." So they say, but Yuta's Rate was only 2?
As his classmates are auctioned off for fortunes, Yuta is sold as a slave for next to nothing. But before long, an encounter with a mysterious white Magic Suit sets him on the path to awaken his hidden strength!

Mecha combat in another world -- let the battles begin!