Kazuki Yotsuga is plagued by visions of giant, destructive robots that no one else can see, he flinches and ducks for no apparent reason. When the pretty and popular Mitsuki Sanada learns about the visions, she takes him to her father, Ken, an eccentric scientist whose specializes in 'dimensional physics'. Kazuki's visions confirm Ken's belief in a parallel world to where he accidentally sends the two teenagers via an untested invention. Now the danger is very real and his allies are twice as strange as he ever imagined. In the very different parallel world, Ken heads the Earth Defense Force, commanding the giant robots that engage in stylized battles against the troops of the fanatic scientist Rara. Kazuki demonstrates an unheard of empathy with the huge mecha Hartzenan, winning a battle for its injured pilot. But all the other pilots are girls and to hide the existence of his new star warrior, Ken puts Kazuki in drag, which leads to new problems.