When it comes to racing kneelers, it's said the deeper the relationship between the driver and passenger, the faster the team. Among parent-child teams, husband-wife teams, boyfriend-girlfriend teams, and brother-sister teams, many are fast. Motegi Girls High School's driver Maria Shishido and passenger Yuria Shishido are a twin team who operate as one. So identical even their parents can't tell them apart, they're skilled racers who control their bike with their impeccable combination. However, there's something bothering them.