Kanagawa's Second Line will be against RT Katagiri, where Takumi encounters Kai Kogashiwa: a former rival from Irohazaka; graduated from street racing and now a professional racer with his MR-S. However, Takumi is starting to show a "Zone" that had evolved from the Purple Shadow races, a zone that even Ryosuke cannot explain. The winner of this race is up in the air.

As the battle heats up, both Takumi and Kai both use all of their ability, and then some, to battle for the win. In the next battle, Keisuke puts his new accelerator techniques to the test against Minagawa's Supra. But as Ryosuke explains, there is another purpose of this training that would allow him to beat the "super-orthodox" pro racer.