A few months before graduating from high school, Takumi is approached by RedSuns leader Ryosuke Takahashi and offered to join him in forming an expeditionary racing team and challenge other teams outside the Gunma Prefecture. Before coming up with an answer to the proposal, Takumi seeks retribution by issuing a rematch to Emperor leader Kyouichi Sudou, who previously defeated him due to an engine failure. He is also challenged by Kai Kogashiwa, a second-generation street racer whose father was once a fierce rival of Takumi's father Bunta. Meanwhile, Natsuki tries to mend her friendship with Takumi during the Christmas season, but the situation goes wrong.