One day, an ordinary middle school student, Itsuki Moriyama, stops by a fortune-telling shop called ``Little Witch'' and buys an old tarot card. That night, for some reason he was drawn to the cards and as he was lining them up, the wind suddenly flew and accidentally summoned the card spirit, Ginga. Ginga breaks the magic seal on the card and transforms into Itsuki's cousin , Konoha Ginga , in order to protect Itsuki and make his wishes come true, and ends up living in Itsuki's house and going to school together.