She Chose the Dragon

Princess Isolde of Viridia is living in the territory of the dragon Kalen, where she was delivered as his sacrifice. Kalen is a thousand years old and the kingdom calls him a tyrant. Isolde finds him gentle and alone, and the two of them, both hurt, look after each other and fall in love. Leon, captain of the Temple Knights, comes out to the dragon's land to ask her to forgive him, and she refuses him. Isolde loved Leon for ten years. She found out he was carrying on with her younger sister Eileen. The kingdom was being tormented by a dragon and had to hand it a woman, Eileen was the one chosen, and Isolde went to the dragon in her place.