Hitomi, a junior high school student, goes to Kabukichou alone to look for her older sister, Yuki, who disappeared a year ago. She wanders into a back alley with a decadent atmosphere. Under the symbol of Kabukichou, “K-chan” Chibi, a cat, suddenly begins to speak to her, “Go find three warriors to save your sister and the world.” What “abilities” do the warriors possess? What is the true nature of “Yuki” which gradually becomes clear? The adventure of a lonely girl and a mysterious cat in search of her sister begins.