"My name is Jaden Yuki, and I go to this school called Duel Academy. I'm a Slifer Red here. Well, about a year ago, we had intruders in our school. The person behind this was my sister Cleopatra Yuki, a sister I didn't know I even had.
Almost all of the students and teachers were killed by cheetahs, a big cat native to Africa. And out of all of that mess, there were only 2 survivors. I'm one of them. The other is the King of Copycats, Dimitri.
Both of us struggled to keep Duel Academy alive. But then, one day, I get a note..."