In a world of continuous war in a different dimension—Tokoyo. There lurks a mysterious organization known as "Seishiro." Komari and her friends rise up to save the world! The long-awaited ninth installment of the series! When Komari awakens, she finds Spica right in front of her. "Let's scatter Seishiro together!" Spica suddenly declares something outrageous. Komari is taken aback by this unexpected proposal from her sworn enemy, but she resolves to join forces to crush Seishiro's ambitions. Komari and the members of the Upside-Down Moon aim for the mining city of Neoplas. This city is bustling with those seeking to strike it rich from the rare ores being excavated, but behind the scenes, Seishiro is scheming. The mysterious "Beast Thieves" that attack people and the Mandala ore imbued with magical power are being unearthed. And Seishiro is weaving a conspiracy to lead the world to ruin. What will become of the alliance between Komari and Spica—!?