Ken Hakozaki, also known as Kenbo of Sagiyama, who works at the Honmoku Pier in Yokohama, chases after a cool female rider but falls over. He then sees the word "KÉNTAUROS" written on the backs of some men.

As Ken comes into contact with the centaurs and comes into contact with the boss, Arthur, and the mysterious lady, he comes into contact with the hearts of riders. He overcomes the past, when his brother Shuji Hakozaki died in an accident during a race, and grows to become a motorcycle racer.