A mysterious care facility owned by the Amazon extermination organization is pursuing Haruka Misuzawa. All come together in a tale of symbiosis and competition, and an end to the troubles and conflicts of the Riders.

The "Amazon Livestock Project," a mysterious care facility, the Amazon extermination organization 4C (Competitive Creatures Control Center) pursuing Haruka Misuzawa . . . all come together in a tale of symbiosis and competition; the mortal combat between the carnivore and herbivore. And, finally, an end to the troubles and conflicts of the Riders, two beings confronting a fierce fate.—Mwd