Project D street racer Takumi Fujiwara faces a surprise rival in the final match against Kanagawa street racing squad Sidewinder: Shinji Inui, a 17-year-old high school student. Shinji, who began driving at an early age, is not only familiar with the mountain route where the race is being held, but he also drives a Toyota AE86—the same vehicle model Takumi drives. Shinji, who was initially hesitant to join owing to a lack of excitement, becomes motivated after seeing the intense combat between Keisuke Takahashi and Gou Houjou. Shinji, who is undefeated on his home course, the Tsubaki Line, may prove to be Takumi's most challenging opponent yet.