Girls that have been dubbed the "Progress" are those which have awakened to the superpower "Exceed". These girls, from the five different worlds that exist, are kept safe and trained at Seiran Academy. They train day and night with their alpha drivers, a person who has the ability to enhance their powers.

In order to destroy the White World's world crystal by injecting a virus into it, Carene must fly at an incredibly fast speed. The only one who can stop her now is Stella and her Exceed with the power of super-speed. With the help of Saya and the others, Stella chases after Carene.

In a final effort to save the worlds, Saya seeks to reconnect with Amane through a fault detected in the process used to imprison the alpha drivers.