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Yuzu Hiiragi and her father run a Dueling school that’s seen better days. If only they had a star teacher to bring in new students! When a rogue Duelist known as Phantom appears in the city, Yuzu may have found a savior, but Phantom will have to deal with the Leo Corporation’s special forces before he can get into any community service!
Hot-blooded highschool girl, Asuka Matsumoto, struggles as the manager of a card shop in place of her father. Even so, aiming for Asuka's special cards, are the assassins of the card gang "Crown" who will attack one after another.
In this world there are five elements of mana, green mana which is grown in the forest and represents life and growth. White mana which is born in the plains and symbolizes order and light. Blue mana which rises from islands and it reflects knowledge and illusion. Black mana which seeps from the swamps and controls death and darkness. Lastly, Red mana which bellows out of the mountains. Chandra, known as the "Crimson Mage" who controls Red mana is acting as the representitive of Keral Keep in order to help a villiage in the Great Western Wood.