Keiichi has been chosen to represent the auto club at the upcoming intercollegiate drag-race. He is promised a motorcycle, but he actually needs to assemble it from scratch just a day before the race! Complicating matters is Belldandy's younger sister, Skuld, who suddenly arrives on Earth and wants Belldandy to return to heaven with her.
Full Recap[]
In heaven, a girl uses a mallet to smite an eight-legged, rabbit-like creature after a struggle, only to be surrounded by several more of them, and she cries out for help.
On Earth, the Nekomi Tech auto club draws straws, choosing Keiichi to be their racer for the upcoming intercollegiate drag race. Otaki tells Keiichi that they'd prepare a motorcycle for him to race. To his disappointment, the auto club merely sent him all of the motorcycle's parts and blueprints so that he would assemble it at the temple.
Inside, Urd is incredibly bored as she watches Belldandy cook breakfast, eventually offering to help. Belldandy hands Urd a bowl of egg yolks to stir, but her attempt use magic instead of doing it manually backfires and creates a huge mess. After cleaning up, Urd goes outside to find Keiichi assembling his motorcycle and offers to help him. Despite being told she can't be of any help, Urd attempts to use magic to build the motorcycle, which again ends in a disaster.
Megumi shows up with more parts, but Keiichi decides to take a bath after Urd ruined his work. Unfortunately, his attempt to unwind is interrupted by a ripple opening up in the bathtub and a girl who enters through it. Only after she panics and knocks him unconscious with her mallet do Urd and Belldandy show up and identify her as their younger sister, Skuld.
Skuld apologizes to Keiichi, and everyone has tea and cake prepared by Belldandy, but as Skuld watches Keiichi and Belldandy act like a couple, she gets upset with Keiichi for making Belldandy stay with him and runs off to the front entrance. Belldandy follows Skuld, and Skuld begs her to come home because she thinks her contract is strange and is frustrated that she has to deal with bugs every day by herself. Urd enters and realizes that Skuld is lonely, though Skuld denies that and almost gets into a fight with her. Belldandy calms them down and tells Skuld that she's not on Earth simply because of her contract with Keiichi, but she wants to fulfill her promise to him, which is that she'll stay as long as he needs her.
Tamiya and Otaki greet Keiichi and Megumi as they work on the motorcycle outside. They complement what they've done so far and are here to give them a gift that will make it go faster. Keiichi already knows it's a twin engine without unwrapping it and he brings up several reasons why he doesn't want to use it. Tamiya insists that Keiichi uses the twin engine for the pride of the auto club, but they're interrupted by Aoshima, the leader of Nekomi Tech's new racing club. He has come to meet Belldandy and gives her several compliments and when he leaves, he reminds Tamiya not to forget the "promise" they made. Tamiya refuses to explain what the promise is to Keiichi before he and Otaki leave.
Skuld finds the blueprints for Keiichi's motorcycle and, being highly mechanically inclined, finds that its calculations are way off. She corrects them for Keiichi and Megumi, though she still hates Keiichi for keeping Belldandy with him.
Nonetheless, everyone apart from Skuld begins working an all-nighter to construct Keiichi's motorcycle off Skuld's design. Later, Skuld approaches Keiichi and asks about his feelings for Belldandy. Keiichi explains that he thought his wish was a joke at first, but he's glad that he's with Belldandy because she's made him forget his troubles and filled his days with happiness, which makes Skuld reconsider her attitude toward him.
The next morning is the day of the drag race. Keiichi shows his motorcycle to Tamiya and Otaki, but Aoshima also visits them. He is impressed with Keiichi's work, but insists he's still going to lose, and that he'll be waiting for Belldandy in his clubroom. Finally, Aoshima clarifies that Tamiya had made a promise to him that if the racing club wins the drag race, Belldandy will join their club. Tamiya and Otaki scurry off, but when Keiichi says that the promise is void because Belldandy didn't consent to it, Belldandy says it's okay because the Auto Club will win. Skuld overhears this nearby and believes that if the Auto Clubs loses, Keiichi will be forced to break his contract with Belldandy, which means her big sister can come back to heaven!
Keiichi starts his first race and easily beats his opponent, but he goes back to Otaki and Tamiya and tells them that his motorcycle is having vibration issues when going over 6000 RPM. Meanwhile, the racer for Aoshima's racing club completes their first race and does it in an even faster time than Keiichi did. They are unaware that Skuld had snuck into the racing club's tent and tampered with their motorcycle to improve its performance.
Nekomi's Auto and Racing Clubs continue to win their respective races until they have to compete against each other in the final, but Keiichi still complains about the vibrations in his motorcycle. Aoshima offers to let the Auto Club give up to spare themselves the embarrassment, but Belldandy insists that they won't lose. She tells Keiichi that as long as he has a burning desire in his heart, the star of luck will be looking over him. Right before the final race starts, Belldandy plants a kiss on Keiichi's helmet as a good luck charm. The race starts, and Keiichi initially is lagging behind, but then the Racing Club's motorcycle blows its engine and allows Keiichi to win the race.
Aoshima is frustrated at his loss, believing his machine was perfect. While her plan to bring her sister back to heaven failed, Skuld sees Belldandy celebrating happily with Keiichi and accepts that she should be happy for them. After the race, Keiichi attempts to buy Belldandy a present from a jewelry vendor nearby, only to realize he left all his money in his jacket. Belldandy tells Keiichi that it's alright, but Skuld tells him she really does hate him and sticks her tongue out to him!