In a futuristic world, the "Nanorace," people whose genes contain nanomachines that grant them special abilities, are controlled and suffer prejudice from the "Purerace" of normal human beings. Beck, a legendary hunter with the power of "Red Ash," aims to undergo the surgical procedure to become Purerace. Alongside the large yet timid mechanic Tyger, they use their parallel machine to fly to the old world, doing dangerous jobs.  One day, they suddenly run into Call, a girl pursued by the duo of Safari and Stripe. Call, Beck, and Tyger together travel to the clockwork world. But Safari, Stripe, and their leader Deny, stubbornly pursue Call, and are finally in a position to make their attack on Beck and his friends.

Red Ash: Gearworld

It all begins with the story that was left untold—the earth-shattering incident where Renton's father disappeared. With the mysterious pilot Eureka by his side, only Adroc Thurston could undo his own mistake, sparking the event that changed everything and earned him the title of a hero. Now, ten years later, Eureka lies in critical condition as Renton leaves the crew of the Gekko. But when he finds himself in the care of his father's old friends, he has a choice to make. Either stay with the loving family he's always wanted, or earn the love he seeks.