During the ultimate showdown with the Kanagawa street racing crew Sidewinder, Takumi Fujiwara of Project D encounters an unexpected rival: the 17-year-old high schooler Shinji Inui. With a history of driving from a young age, Shinji not only knows the mountain pass of the race but also pilots a Toyota AE86, mirroring Takumi's own car. Initially hesitant to join the race, Shinji's passion ignites after observing the intense duel between Keisuke Takahashi and Gou Houjou. With an unbeaten record on his familiar Tsubaki Line territory, Shinji poses a serious challenge to Takumi's racing prowess.