Rin Shima returns home from school one day to see an unusual three-wheeled motorbike parked outside her house. After inquiring with her father about it, she discovers that the car is a loaner while her scooter has its yearly repair. Rin has no option but to use the three-wheeler because he has plans to go camping at Yatsugatake the next day. Rin's traveling experience quickly switches gears as she goes on her journey, and she experiences a refined driving performance on fresh uncharted highways.