The story begins as a mage known as Arcs Sheldart Elbayas has been put on trial in front of a council. He is transformed into a duck as punishment for his sins, and sent to Earth. Arcs then gives Ink Nijihara the "Magi-Mail" cellphone that transforms her into a magical girl, able to get closer to her crush, Nao-kun, via English tutoring lessons, and defeat the darkness that arises from Arcs' world.

Credit: Wikipedia