Invertia... an unprecedented disaster that struck the world during the 20th century.

Within the meteor, an unknown element called mana was discovered, which gave rise to a new species
of human born with unique skills — Genestella.

At the academy city above the water, Rikka, also commonly known as Asterisk, the world’s greatest comprehensive battle spectacle, the Festas, is held. In order to fulfill his own wish, scholarship student Ayato Amagiri swears he too will fight in this city!