A young man named Yuuki awakens in an unknown world with no memory of his past. Together with his self-proclaimed guide, Kokkoro, the pair set forth into the beautiful land of Astraea. After arriving in the royal capital of Landosol, they visit the Guild Association in search of work to pay for their lodging and embark on a mushroom-hunting quest.

The members of the guild Elizabeth Park encounter a Shadow within the forest near Targum Village. During the ensuing battle, one of the members, Shiori, is swallowed by the beast. Upon learning about the situation from Shiori's older sister, Hatsune, and the other members, the Gourmet Guild joins forces with Elizabeth Park to fight the Shadow and save Shiori.

Yuuki and Kokkoro visit their familiar haunt, the Cockatrice's Nest, to drop off a souvenir. However, they arrive to find the owner frantically making pudding, as though he's been possessed. Just then, a diviner named Shinobu arrives on the scene.

With the help of Labyrista, the Gourmet Guild members are able to avoid the mighty Shadow X's attacks and escape to a temporary version of the Landosol royal palace, created with her ability. Kokkoro is shocked to see a portrait of Pecorine hanging in the palace. Wearing a solemn expression, Pecorine reveals a big secret that she had been hiding all along.

One morning over breakfast, Kokkoro pulls out a map showing the location of the ultimate seasoning known as "Drops of the Sea." Though the information had proved too questionable for even the Guild Association, Pecorine insists that they go as part of their guild activities. Her enthusiasm proves to be contagious, and thus the Gourmet Guild sets off on a brand-new adventure.

One day, Yuuki heads out to deliver an item to a client. When Pecorine and the others meet up with him, they discover that the client is Tsumugi, a member of the popular idol group Carmina, and Yuuki is being made to wear a cute outfit at her behest. The group is naturally confused, but there seems to be a reason behind it...

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.

Kokkoro arrives at the post office to send a letter, where she is unfortunate enough to encounter a group of robbers who have broken in. In order to recover their stolen letters, Kokkoro joins forces with two Lucent Academy students named Suzuna and Misaki to pursue the thieves all the way to their hideout...

Pecorine finally confronts the Omniscient Kaiser, joining forces with Kokkoro and Yuuki, who come to aid her in the fight. Karyl finds herself torn between her loyalty to the Kaiser and her bonds with the Gourmet Guild members. As their feelings clash, the battle enters its final phase. Yuuki, Pecorine, Karyl, and Kokkoro—what future will the Gourmet Guild choose...?