Skuld, Belldandy's younger sister, is overworked from hunting bugs in heaven. A bored Urd continues to get in everyone's way on Earth by accidentally exploding a cake Belldandy is making and an engine Keiichi is repairing. Lonely and overworked, Skuld comes to Earth and tries to convince Belldandy to return with her. Keiichi is working hard to build a motorbike for an upcoming drag race. With Skuld's help, they complete the bike in spite of the difficulties posed by Toraichi Tamiya and Otaki Aoyama, leaders of the Auto Club. On the day of the race, Toshiyuki Aoshima, leader of a rival club, reveals that Belldandy is the prize for the race – the winning club will gain her as a member. Skuld, still hoping that Belldandy will leave Keiichi to return with her, tampers with the rival club's bike so that Keiichi cannot win. In the final race, Keiichi wins after taking the flag when the other bike's engine fails.