There was a country called Lairland, which had been prospered for hundreds years. But their peaceful life suddenly ended when a group of invaders attacked them. Like this, the war between humans and a different creature broke out. Five months later, Hiro, a young soldier, finally killed the boss of the invaders. He, who was exhausted, somehow returned his homeland and met a girl asleep. She soon woke up and shone herself. The light covered the sky like rain and soothed every nightmare happened in the world. "Chiria...." She whispered and fell down powerlessly.... When she regained her consciousness, she didn't remember anything at all. Hiro and Chiria's life now begins...