As Tsukasa and the other Prodigies prepare for the Republic of Elm's first-ever election and the transfer of power to the public, a new problem arises in the form of Princess Kaguya. The ousted royal is from Yamato, a nation subjugated by the Freyjagard Empire. She pleads that if the Prodigies truly believe in equality for all, then they must help liberate her country. Not everyone agrees that aiding Yamato is a wise decision, however. And no matter what Tsukasa decides, the choice will impact the future of the world...and his friends!