Equipped with the [Witch] system, the only boarding weapon "Reverse God Machine" Verial that can counter the enemy "God Soldier" of humankind. A dropout from the school that trains the passengers, Shuuta Tsukuba meets Firis, a girl who claims to be the strongest witch on the day of her dropout match. Taking this opportunity, he blossomed his smouldering talent-the opening of a new full-scale robot action presented by the weakest boy and the strongest witch!