At the dock of a certain city, a group of modified car racing enthusiasts gather every night to race. Among them, the young master of the large car modification shop "D&S", Kurosaki Yuya, who drives a black FD, is the undisputed overlord. In this day's race, he defeated Blazech who drove a 180SX and Daidoji Risuo who drove a Z32. After the race, a girl secretly took a close-up photo of the black FD with a digital camera. The girl's name is Sakurai Mahiro. Her father Tatsuji was a skilled car modification technician. He lost his original work ability due to illness, and the "Sakurai Auto Factory" opened by his family is facing a crisis. In order to revive, Mahiro went out to collect the current popular car parts, so he ran to take pictures for reference. After Yuya found that someone was secretly taking pictures, he arranged his men to chase. At the critical moment, a man in his thirties saved Mahiro. The man's name is Akahoshi Sato. He was originally an undefeated racing enthusiast with the reputation of being the fastest, but because he lost his friend in the racing, he no longer pursued speed and began to wander around. Sato found that the girl had left her digital camera behind and sent it to the "Sakurai Car Factory". There happened to be a business there, but the Sakurai father and daughter and the helpers were unable to complete the task. Sato couldn't help but step forward to help, showing his amazing modification skills. Shinichi let him stay at home for one night as a reward. The next day, Sato found a white car in the garage. This was an old car FC that Tatsuji had modified before, and its performance was quite outstanding. Sato was touched and decided to stay in the car factory to work. With Sato, the car factory business is booming. Yuya's father wanted to poach Sato, but was rejected. Yuya learned about Sato's past from Rio. He issued a letter of challenge to him, but Sato was indifferent to his provocation. Yuya sent people to the Sakurai Car Factory to make trouble and set fire to the car. Sato thought that he had implicated the Sakurai family and was very depressed. In order to comfort him, Shinichi asked her to go for a drive together. Shinichi's warmth made Sato's heart burn. Sato decided to accept the challenge, and he wanted Yuya to promise that if he won, he would not destroy the Sakurai car factory again. Yuya replied arrogantly: "I will defeat you and that small car factory together." A car race began...