ENRaphtalia, a demi-human girl, was living happily with her family and friends. However, she loses her parents to a monster that appeared during a phenomenon called the "Waves of Calamity". Her village that was on the brink of destruction then got plundered by soldiers who came to her village and turned her into a slave. However, her fate made a drastic turn when she meets Naofumi Iwatani, a hero summoned from another world to save this world. The bond between the two gradually deepen as they live together while fighting the monsters from the "Waves of Calamity".A retelling of the main story in the perspective of Raphtalia