A fantasy about a different world that celebrates life and sings of love. A healer who has the unique ability to cure disease and is said to be the world's last hope. While on an overseas expedition, Laila, a newcomer to the world, meets a beautiful demoness named Lail, who is kept in the royal castle. The two live out their predetermined destiny, and what develops between these two. 病を治す異能を持ち、世界最後の希望と言われる薬術師。新米薬術師のライラは国外遠征中に、王城で飼われていた美しき妖人レイルと出会う。 その夜クーデターが勃発し、ライラはレイルを護衛として雇って逃亡の旅に出ることになり……。 定められた運命を生きる 二人の間に芽生えるものは―――