The N-Warriors, Parallel Episode I: Cephiro's Dream Chapter

Alan, a human from Earth, was transported to a world named Regno Tenebrae, the world of Duel Monsters, where he became a Keyblade Wielder, and tried to save the world. However, in the middle of his adventure, he woke up in the magical world of Cephiro, where he will help the Magic Knights on their quest to save Cephiro and find the reason why he was summoned there.