The Ezelta empire has long been on the verge of losing a fierce war, but it has now come to pass. After losing the war, Saint Julietta makes every effort to protect the livelihood of new emperor Luchino and the citizens of the empire, all while resolving herself that Emperor Luchino could sentence her to death at a moment's notice. But she soon discovers he's very kind and, after he reminds her of an oath she made 400 years ago, she ends up marrying him?! "You can still win this war," she tells him... So with her hidden power, she begins to bring about a miracle! 聖女ジュリエッタは、敗戦間近のイゼルタ皇国の新たな皇王ルキノに四百年前の誓約を持ち出されて結婚することに！　 ルキノと敗戦後の民の生活を守るべく奔走する中で、ジュリエッタは処刑覚悟で皇王になったルキノの優しさを知り!?　 ――「まだ勝てますよ、この戦争」 ジュリエッタの隠された力がここから奇跡を起こす！　聖女と皇王の大逆転劇物語!!