Sakura is a young high school girl who moved with her family to Germany after the chaos created by elementary dragons pushed humanity to the edge of the world.

Natsume Uta meets a mysterious girl at the highest peak of the school, the roof top. Having met her, he finds himself thrown into a time wrap to a world identical to his. During the day everything seems normal, but at night it all changes. Natsume uncovers the secrets, supernatural and truth behi...