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...