Rashil lives with his grandpa in a mountain area. During a trip in the woods he sees an airship crash and finds a girl. She's been followed by soldiers, who want to capture her.

The world is terrorized by the powerful Black Witch who has been sealed in the moon. Every ten years, the night of Hexennacht arrives and a chosen witch must battle the Black Witch in hopes of finally defeat...

In the far future, humans abandon the devastated Earth and move to the upper world "Tenjo". But Tenjo and the law of causation collapse from a war and humans return to the Earth, which has turned into an uni...

Side story of Kyoukai Senjou no Horizon bundled with the first press release of the 1st, 3rd, 5th and 7th Blu-ray volumes of both seasons of anime. This side story follows Asama, Kimi and Mitotsudaira aboar...