One day, a mysterious dream monster named Chao suddenly appears in front of a young man, Kanata Harushina (Haruka Kanata), to help Kanata make his dream come true, and to become a treasure hunter. Dreamy Kanata immediately takes Chao to find Kinokuniya Bunzaemon's hidden treasure, where a great obstacle awaits. Will Chao be able to make Kanata's dream come true?