An all new original story about a part of Tokyo that suddenly floated up in the air by a mysterious power. With the aerial city being called "Old Tokyo" and the leftover part named "New Tokyo", Tokyo was kept separated for 13 years. Kanata is a high school freshman living in Tokyo. One day, he was attacked by a monster where a blue haired girl, Sora saves him. Sora needs Kanata's power in order to prevent "Old Tokyo" from falling down.
This is a set of a Blu-ray and DVD.

Premium Edition includes an Android exclusive serial code to receive an in-game limited item: (Digi Con) 1 x Jushingyoku *Only host. 1 x Juryugyoku *Only host. 1 x Koshingyoku *Only host. "Keikenchi Tanmari! Tasu no Sokutsu" 1 x ticket. *Selectable to play either solo or multi-play. Valid through March 6, 2019 - Nov.30, 2019. *iOS is not compatible. Comes with an original smartphone case and 5 x post cards.