Romance of Princess and Demon

"Give me your heart" The demon said and rose went deaf for a moment, she didn't hear him right did she. "Sorry I can't hear you" she said and he reiterated what he said and her eyes widened, she became absolutely sure about what he had asked, but why would he ask for something so outrageous, he knew that their love was forbidden and they were not meant to be. Rose the princess of the human clan set out to the forest in search of the demon, they negotiated and the demon asked for something in return but she couldn't give him, she would bring an impending doom on her citizens, but what if his undying love changes her decision?. Their love grew to become immeasurable, what happens when there is a love triangle?, what happens when the promises.they made to each other break, what happens when the whole world kick against the idea of them being together?. Let's follow rose through the road of love, danger, heartbreak, jealousy, love triangle, promises and touch of romance.