科学技術が高度に発達した機械仕掛けの理想郷「帝国」。 超常の力を駆使し、“魔女の国”と恐れられる「ネビュリス皇庁」。 百年にわたる戦争を続けてきた両国には、二人の英雄がいた。 最年少にして帝国の最高戦力となったイスカ。 ネビュリス皇庁の王女にして“氷禍の魔女”の異名を持つアリスリーゼ。 戦場でめぐり逢った二人は、命を賭して戦う宿敵となった。 国を、家族を、仲間を守るため、決して譲れない矜持と矜持をぶつけ合う。 しかし、激闘の中で互いの素顔に触れた二人は、 その生き方に、その理想に惹かれてしまう。 ともに歩むことはできず、残酷な運命に翻弄されるとわかっていても。 ……そんな二人を嘲笑うかのように、世界の緊張はなおも高まり、 大国の謀略が交錯しようとしていた。 分断された世界、それでも少年と少女は想いを募らせていく――。

"The Empire": a mechanized utopia with highly developed science and technology. "The Nebulis Sovereignty": a nation feared as the "Land of the Witches" whose people use paranormal power. The two countries have been constantly at war for more than one hundred years, but now two heroes have appeared in their respective lands. Iska has come to be recognized as the greatest military asset of the Empire at the youngest age in its history. Aliceliese is the Princess of the Nebulis Sovereignty, called the "Ice Calamity Witch" with fear by her enemies. The two meet on the battlefield and become mortal enemies. Prides lock horns as they both fight uncompromisingly to protect their respective nations, families, and comrades. But as they get to know each other as real people during their fierce battles, they start to become attracted to each other’s ways of life and ideals... though they are fully aware that fate will mock them cruelly, not allowing them to be together. ...Sure enough, the world's tension heightens even more, and conspiracies of the major nations become more entangled. But even in such a world divided, this boy and girl cannot stop their feelings for each other…