X pilots a robot called “Red Robo” in order to earn enough money to buy a new body for his girlfriend, Patricia, who lost her whole body in an accident when she was 14 years old.
X is a hot-blooded mecha otaku who salvages junk and assembles it into giant robots called “Mobile Wheels”, which he pilots in competitive races.
Patricia is sprightly and energetic, but since she doesn’t have a physical form, she can’t eat or go outside.
Jennifer is a rival racer who lost something dear to her when she was younger, and she pilots the robot that her late husband used to race.