Description: A world where the land was devastated by a past disaster. Humanity built towers that reached up to the stars and cities in the sky, and enjoyed an era of prosperity. However, the empire that rules the tower treats those who remain on the ground as unclean people, and subjects them to discrimination and oppression. The main character, Kyle, who was born as an earthling, meets the legendary rebel dragon Liberio during a resistance movement against the Empire, and ends up inheriting his power. Kyle learns that the tower is the source of the star's life and the dragon vein's mana, so he fights to regain the land where he can live freely.