In the beautiful land of Astraea where a gentle breeze blows, a young man named Yuuki awakens with no memory of his past. There he encounters a guide who has sworn to care for him—Kokkoro, a lovely swordswoman who's always feeling peckish—Pecorine, and a cat-eared sorceress with a prickly attitude—Karyl. Led by fate, these four come together to form the "Gourmet Guild." And so their adventure begins...
Sometime after the events of Kamen Rider W, Shotaro Hidari and Philip continue to solve crimes and fight evil as superhero detectives in the windy city of Fuuto.
Yoko Asagiri is in love, but is afraid to confess her feelings so she writes a song to express her feelings. Much to her dismay, the love song she wrote acted as a bridge connecting the world in which she lived in to that of Earth's alternate world called "Ashanti." There, the ruler of that world wants her song so that he could use it to open a doorway to Yoko's world and conquer it with his armies. Using the artifacts left behind by the legendary warrior Leda who prophesized her arrival, Yoko and her newfound friends must stop the tyrant's ambition and return both worlds to their proper place and balance.
