At Fujiyokidai High School, Yomogi Asanaka meets Gauma, a mysterious individual who claims to be a "kaiju user." Suddenly, a kaiju appears, and Dynazenon, a massive mechanized fighter, appears with it. Yume Minami, Koyomi Yamanaka, and Chise Asukagawa are unwillingly thrust into the fight against the wicked creatures at the most inopportune moment.