Golden Fruit Cup
Kougane is the manifestation of an artificial Golden Fruit created by an Over Lord in the past. His awakening eventually accelerated the race's extinction as they fought to the death. Lapis, a young Over Lord sealed him at the cost of his own. Nonetheless, his curse on the Femushinmu remained, leaving them endangered. Ryoma Sengoku discovered his seal and unintentionally released him, resulting in his own death. Kougane's existence causes the Armored Riders to lust after each other for the "Golden Fruit". Slowly, the Armored Riders start to kill each other off as Kougane masquerades as Yuya to get to Kouta. The deaths of the fallen Armored Riders strengthens Kougane's "Golden Ringo" Lockseed. When it is revealed that he is not really Yuya, Kougane transforms into Armored Rider Mars and defeats Kouta. Corrupting Gaim into Gaim Yami, the two go after Lapis. However, Ryugen, Baron, and Marika interfere, with Lapis disrupting the mind control on Kouta. Kouta transforms into Gaim Kachidoki Arms and chases Mars in a fight that ultimately allows most of the deceased Riders, whose hearts were not fully corrupted like Sigurd and Duke, to return to aid Kouta. Mars emerges as a flame horse and is defeated by the Armored Riders as the world returns back to normal, also resulting in Lapis' disappearance.