After coming back from school, Rin Shima noticed an unknown three-wheeled motorbike parked outside her house. Upon inquiring her father, she discovered that it was brought as a temporary substitute for her scooter, which was undergoing its yearly inspection. Although she had already planned a camping excursion to Yatsugatake for the following day, Rin had no alternative but to go for the fresh ride. But, to her surprise, it turned out to be a delightful experience she explored new paths and gained command over some more skilled driving tactics.