Has no relation to the F-Dynasty Spain's team.
The reading series is under fanfiction.net .
It is (probably) based a year after G-Revoulution and also introduces Metal Fusion Characters along with the author's own characters.
It also features Kenta as a main character.
The other Protagonists made by the creator of the series are :
Aki = she has only a brief appearance in episode 1 though in episode 2 the creator states in the summary that he may make Aki a main character.
Read the story here http://www.fanfiction.net/u/2346426/Da_Maztah_of_Spartah