Rein Cronstedt is a twenty-three-year-old talented and aspiring businesswoman who came from the country to the Empire to establish her restaurant. As fate ties up her strings, she meets the man of her dreams, Prince Thomas. Everything is supposed to end happily ever after when it started to go wrong during Prince Thomas's birthday. Rein turns into a dragon while forgotten memories stream into her consciousness as confusion flees her into the sky. Along with this, vampires declared war on humankind slaughtering every human they set eyes upon and destroys every place they pass. Due to the unending war, the angry Drei, the strongest dragon, wakes up from its sleep joining the destruction. However, in all of the chaos and confusion, Prince Thomas meets the dragon Rein. The lives they lived all along turns into a lie as the truth reveals with the appearance of Prince Thomas's real mother.Who is Rein? Who is the real Prince Thomas? Will Prince Thomas's feelings for Rein stay the same after knowing everything? And with all that's going on, will they defeat Drei who wiped out all elves and dwarves three hundred years ago?