While visiting a store in Landosol, Yuuki and Kokkoro encounter Aoi wearing an unfamiliar uniform. It turns out that Aoi is a new student at the prestigious St. Theresa's Academy for Girls, but is worried she won't be able to fit in. Thus Yuuki and Kokkoro head to the school with her as moral support.

Having journeyed to Monster Isle, the Gourmet Guild runs into Kasumi and Makoto, who are there with their fellow Caon members to investigate a series of recent Shadow appearances. Armed with an extensive knowledge of Shadows thanks to their previous battles, the Gourmet Guild members decide to help with Caon's investigation...

The Shadows on Monster Isle form a swarm with the golems and launch an attack on the islanders. Meanwhile Pecorine suddenly disappears from sight. While the Caon members, along with Yuuki and the others, are putting up a desperate fight to protect the island, Kasumi comes up with a secret plan to stop the Shadows' progress.

Pecorine and company visit a crowded festival in the Landosol shopping district, where they enjoy their time sampling the various food stalls and playing shooting games. Labyrista looks on with kind eyes from Labyrinth's crepe shop, overcome with a certain feeling...

Pecorine confesses to the people of Landosol that she is the true Princess Eustiana. In order to reclaim her name and throne, she vows to overthrow the imposter princess—the Omniscient Kaiser. However, she must first fight against the captain of Nightmare, Jun, who has been brainwashed...