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

Summary

You Feng contemplates the exaggerated design by Crab Brother but acknowledges its worth. After a night of card games, he heads back to his dormitory for some sleep. As dawn approaches, a fire ignites in the forest due to volcanic heat from a duel, prompting You Feng to check on the situation. He learns from Katsuya Jonouchi that the Duel Academy is facing a fire emergency, and he discovers that the Osiris Red dormitory has been completely consumed. You Cheng Shi Dai is blamed for the fire and must duel to remain at the academy. You Feng decides to let him stay in his dormitory temporarily. Later, while having a late-night snack, they encounter a mysterious duelist who turns out to be Teacher Da De, revealing his connection to the Seven Stars. Teacher Da De expresses his desire to duel You Feng as he seeks a key, indicating a significant challenge ahead.

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