In Yu-Gi-Oh, but Mechanical Ascension (1-148).

Summary

You Feng organizes his advanced fusion deck, which includes powerful cards like the Iron Drive Dragon. The next day, he notices his classmates, Tian Shang Yuan Ming Ri Xiang and You Cheng Shi Dai, are affected by a previous duel. They excitedly discuss the duel with him, while Professor Ku Luo Nuo Si enters, hinting at romantic tension involving You Feng and Ming Ri Xiang. Manzoku Jun, who harbors feelings for Ming Ri Xiang, feels threatened by You Feng's presence. Professor Ku Luo Nuo Si announces a rare card pack sale, generating excitement among students. You Cheng Shi Dai rushes to buy cards, while You Feng and Marutou Ryou discuss their interests. Manzoku Jun challenges You Feng to a duel, which You Feng accepts, agreeing not to use his strongest deck. Both prepare for the duel, declaring, "Duel!"

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