Set in a world where dueling is a worldwide pastime and profession, a casual duelist named Yurik Clayer receives a new card in the mail as a gift from his otherwise absent father. Once he uses it in a duel, the card's powers are unlocked, causing it to summon another world just outside of Earth, along with it, one of its inhabitants, a winged unicorn named Twilight Sparkle.

After being taken by an underground vigilante faction named Guardiaboliques, Yurik and Twilight must work with them in recovering Twilight's other friends from her world, who also go missing on Earth. Along the way, Yurik hones his skills as a duelist while Twilight shapes hers, and the two of them work with Guardiaboliques to shape the future of both of their worlds.
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Rated everyone, but features simulated monster violence and mild language.