The story revolves around Tatsuya and Kiyoko, siblings and children of a scientist employed at Twin X lab. They participate in a series of races on imaginative tracks designed to showcase their skills. As the story progresses, it unravels the true identity of the Emperor, who possesses several titles and is likened to the Yonkuro Emperor. The climax occurs when the siblings compete against a group of treasure hunters who aim to take advantage of the top Mini 4WD racers. This gripping tale is brought to life by the renowned Yonkuro Hinomaru.
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