The earth is ruled by the Black Witch.<br />The Black Witch was sealed in the moon and can only be judged once a decade on the night of Hexennacht.<br />The ones who can fight the Black Witch are the chosen magical girls who have won their battles.<br />Horinouchi Mitsuru, the Eastern Japan representative who aims to be the strongest, happens across a girl with strange power who says her name is Kagami Kagami.<br /><br />The girls "clash"!<br />To save the world with their own power!!