Kyousuke Jin is the Gear Master of the Tobita Club. He was once a member of Team Griffon along with Kuroudo Marume, but a dispute between them causes him to quit the team. He is the third Gear Fighter to be recruited into the Tobita Club. His Crush Gear is Dino Spartan, and later on in the series, Dino Phalanx. 

After losing almost all their members, the Tobita Crush Gear club is facing extinction. Kouya who dreams of being a Crush Gear Fighting Champion doesn't want to see the club become extinct and will do whatever he can to keep the club running and become a Crush Gear Champion.

Kouya Marino hasn't set foot in the Tobita Club for a long time - not since when his older brother, champion Crush Gear Fighter Yuya Marino passed away four years ago. But when the C.G. club his brother was once part of is threatened with extinction from a rival team set up by the Mangajin Corporation, it is up to Kouya to restore the Tobita club to its former glory, using no less than Yuya's prized Crush Gear - the Garuda Eagle!! 
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The spirited Crush Gear fight is about to begin!