After the 13 Devils have been defeated once more in the Kaido Circuit, Motoya Iwasaki, aka Speed King, disappeared suddenly, leaving without a trace. Since then, many drivers from all the Japan come to Tokyo in order to have his title of "Speed King". The hero here is the best friend of Iwasaki and beats Bloodhound, Midnight Cinderella, Platinium Prince, Skull Bullet's gang & eventually, the Phantom 9. In the meantime, Bloodhound reveals to the racer why Iwasaki has been depressed for a long time : his girlfriend died because she was ill and Iwasaki wasn't there to support her.

After the 13 Devils have been defeated once more in the Kaido Circuit, Motoya Iwasaki, aka Speed King, disappeared suddenly, leaving without a trace. Since then, many drivers from all the Japan come to Tokyo in order to have his title of "Speed King". The hero here is the best friend of Iwasaki and beats Bloodhound, Midnight Cinderella, Platinium Prince, Skull Bullet's gang & eventually, the Phantom 9. In the meantime, Bloodhound reveals to the racer why Iwasaki has been depressed for a long time : his girlfriend died because she was ill and Iwasaki wasn't there to support her.