Tachibana Racing Club

Tachibana Racing Club is a racing club led by Tobei Tachibana that Takeshi Hongo was part of. The racing club's official logo also became the Rider emblem for the Double Riders.

Additional Members
Female members join the Tachibana Racing Club, after Takeshi Hongo's departure. They appear from episode 14 to 25.
 * Mari - has experience in fencing.
 * Yuri - a martial artist
 * Michi - a small-displacement rider
 * Goro - Yuri's kid brother, and a junior member of the racing club.