She was originally a fearsome demon of the night, feared by all in modern times, but by chance, she obtained an ancient ring. Betrayed by her best friend, she unexpectedly found herself transported to another magical world. In this new world, she found herself with a devilishly handsome prince to play with. From then on, she killed, he handed her the knife; she set fires, he fanned the flames. Thus began their extraordinary life together.