The year is 20XX AD. Mii Kouryuuji is a high school student and cheerleader whose sacred treasure known as the "Portalstone" has been stolen by a mysterious group called "Oros Phlox", led by Due Flabellum. With the Portalstone in the hands of Oros Phlox, a series of mysterious portals suddenly connect to the real world. Mii enlists the help of her tutor and bodyguard, the ninja detective Kogoro Tenzai, to help find the Portalstone. A long journey awaits for the heroes of the past, present, future, and other dimensions. Can Mii Kouryuuji and her bodyguard Kogoro Tenzai locate the stone and defeat Oros Phlox?
—Anonymous