Yu-Gi-Oh, the tenth generation of card-playing simulator!

Yujo Judai's diary:On August 2012, 8, I traveled to a strange world. The people here had very high dueling skills and a bunch of summoning methods that I had never seen before. I couldn't beat any of them, but fortunately I returned to my own world safely in the end.August 2012, 8, great! The written test results are out. Because of that time travel, I was able to answer a question that I had never been able to answer before, and I got a good score of 12th in the written test! But why do I miss the duelists in that world?On August 2012, 8, I traveled to that world again. Damn it, why can't I beat them?......On March 2013, 3, the principal said that there is a terrorist organization called Seven Stars in our world?On April 2013, 4, the seven stars were all solved, and they were delicious........Hey, it’s the gate to the new world! ?