Beginning his first year of high school, all Matsuboshi Raidou wants is to make friends—starting with the cute, tiny, and soft-spoken Reina Aharen, who sits right next to him in class. Unbeknownst to Raidou, Reina shares the same sentiment, but she has a problem. Awkward and timid, Reina is incapable of determining how chummy she has to be when approaching a person. Due to Reina's complete inability to gauge personal space, the two struggle to spark their unlikely friendship, as even the simplest tasks like talking seem impossible for them. But despite the countless yet pointless challenges that hinder the pair, the overly imaginative Raidou will do whatever it takes to befriend the indecipherable Reina.

One day, Hitoyoshi Yokoya wakes up to a mysterious nameless girl dressed as a maid ringing his doorbell, asking to be his servant. With her former master referring her to the Yokoya household, she offers her expertise as an assassin. Intimidated by her background, Hitoyoshi tries to send her away; but when she leaves something behind, he rushes to return it to her and is nearly hit by a truck in the process. With her fast reflexes, the girl saves him just in time, and Hitoyoshi ends up taking her in. Ironically, the maid lacks any skills apart from the art of killing she has perfected since childhood. Nevertheless, Hitoyoshi welcomes the girl with open arms, encouraging her to leave her monochromatic past behind and experience a normal life. To seal the deal, Hitoyoshi names her Yuki, marking the beginning of her path to redemption and happiness.

The second race in the MFG tournament at the notoriously difficult Lake Ashinoko track is underway. Though his car is severely disadvantaged in terms of horsepower, tune-ups to Kanata Katagiri's Toyota 86 GT allow him to quickly soar into a qualifying position. However, torrential downpour on the final day of racing brings tire traction woes and causes all drivers to struggle. Thanks to the environment he grew up in and his extensive training, Kanata surprises everyone when he is able to pull ahead of the pack—albeit with some very risky maneuvers. However, there are still two formidable competitors ahead of Kanata: last race's winner Michael Beckenbauer and Lake Ashinoko record holder Kouki Sawatari. But even if Kanata can close the gap, he still needs to watch out for the drivers in his rearview preying on even a single mistake that they can take advantage of.

As electric vehicles dominate everyday life in the 2020s, interest in traditional combustion engine cars is maintained through a motorsports series known as the MFG. Hundreds of ambitious drivers, with a staggering 30 million viewers online, fiercely compete for a spot in the Godly Fifteen—the leading 15 racers—and a chance at the grand prize of 100 million yen. Among these individuals aiming for the top is 19-year-old Kanata Rivington. Having attended a famous racing school in England, Kanata sets his sights on the upcoming MFG tournament and enrolls in the competition under the alias "Kanata Katagiri." In comparison to his opponents' flashy vehicles, Kanata's Toyota 86 GT, passed down from a former MFG contestant, puts him at a considerable disadvantage. Kanata receives guidance from a Godly Fifteen member, but he still treats the MFG as only a stepping stone for his true goal: locating his estranged father. Meanwhile, Kanata's appearance sends shockwaves through the scene as his driving style eerily resembles that of a once legendary racer.