Yu-Gi-Oh! Go Rush!!

Intruders Breaking the Ru-ru-ru-ru-rules (1x21)

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Yuhi and co. return to the surface to do some sleuthing about Goha Yuna. However, even though they’re about to start their investigation, Yudias is nowhere to be found. As they investigate the Goha Company, a fragment of Fisher Sky, Navel No. 81, informs them that Yudias is in danger.