Zack Strider, the ace racer in Babylon, finds himself in trouble when strange monsters, known as Umbras, attacked his city. Then he was suddenly transported to a different place by that mysterious man who came for him. After arriving at his designation, he accidentally stumbled upon the princess of the Solaris Kingdom, Elizabeth, who's taken a bath at the moment.  After a series of mishap and accidents, Zack somehow entering a school where students are raised to be Stellar-Crusaders, knights who use ancient weapons found from the ruins, Stellar Armor.  Let the academy fantasy battle begin! Genre+: Mecha, Fantasy. Ecchi, Drama