The nature of battle has altered in the far future. "Objects"—massive, spherical tanks impervious to ordinary armament and armed with devastating firepower—rule the battlefield; their simple deployment assures victory, leaving regular armies ineffective. This new technique of combat, however, is going to be flipped on its head. Qwenthur Barbotage, an Object Design student, and Havia Winchell, a radar analyst of noble family, are members of the Legitimate Kingdom's 37th Mobile Maintenance Battalion, which is in charge of sustaining the Baby Magnum, one of the nation's Objects. Unfortunately, a botched combat puts the couple in perilous circumstances: simple troops are pitted against the unfathomable might of an enemy Object. A spark of optimism flashes through as they try to rescue themselves and their fellow troops, and the world's perception of Objects is changed forever.