This is a magical world. A world where swords and magic, knights and wizards, humans and demons, fairies and dragons, gods and goddesses, and various fantasy existences exist. The world is still full of mysteries. And as far as the eye can see, only a speck of mystery has been solved. Searching for a truth behind the dark mystery, it is the existence of adventurers who will reveal all the curtains. Those who want to walk on the lake of fire, sail the ocean, climb the clouds, is an adventure that is eagerly awaited. Owning a story, which was later copied in a picture book was what they craved the most. Singed through poetry, a story can be passed down. Eira Frostine. She's just a part of fantasy life. Even so, all she did was shut herself at the edge of the world. Live on a white ground and sleep on an all-white altar. With a large body covered in silver ice, she had already lived for thousands of years. Indeed, it was the Ancient Ice Dragon, Eira Frostine, a legendary existence, a mystical existence known only to stories, and an existence that was rumored to have disappeared. With her dragon majesty aura, the frozen air she will always carry with her wherever she goes. Forests, cities, oceans, even the sea of ​​fire will freeze when she passes. Humans are afraid of the terror brought by her. Even though humans had sent thousands of heroes, no one could match her. But thousands of years ago, her existence vanished without a word and disappeared without a trace. Humans are relieved by her departure, forgotten in the mind, and only become part of the popularized fairy tales. Without realizing that the existence of the Ancient Ice Dragon, Eira was an existence that was immortal.