During an Outdoor Activities Club meeting, Nadeshiko Kagamihara, Aoi Inuyama, and Chiaki Oogaki debate what it means to be a real Yamanashi native. Somewhere along the line, Chiaki brings up the Yamanashi Kids' Stamp Rally, which Nadeshiko has never heard of. The rally encourages one to visit famous places in the prefecture and collect stamps; those who complete the rally will win a year's worth of Minobu steamed buns. Enticed by the humongous food prize, Nadeshiko is set on participating. Follow the Outdoor Activities Club as they travel around the Yamanashi prefecture to collect stamps and explore what the region has to offer!

While the perfect getaway for most girls her age might be a fancy vacation with their loved ones, Rin Shima's ideal way of spending her days off is camping alone at the base of Mount Fuji. From pitching her tent to gathering firewood, she has always done everything by herself, and has no plans of leaving her little solitary world. However, what starts off as one of Rin's usual camping sessions somehow ends up as a surprise get-together for two when the lost Nadeshiko Kagamihara is forced to take refuge at her campsite. Originally intending to see the picturesque view of Mount Fuji for herself, Nadeshiko's plans are disrupted when she ends up falling asleep partway to her destination. Alone and with no other choice, she seeks help from the only other person nearby. Despite their hasty introductions, the two girls nevertheless enjoy the chilly night together, eating ramen and conversing while the campfire keeps them warm. And even after Nadeshiko's sister finally picks her up later that night, both girls silently ponder the possibility of another camping trip together.

When Chiaki Oogaki and Aoi Inuyama start the Outdoor Activities Club at their school, it is only the two of them and an array of ambitious plans. Things do not change much even after a new member—Nadeshiko Kagamihara—joins. And yet, the cheerful, cozy atmosphere seems to bring many curious visitors to their small headquarters. As the three girls set out on a camping trip to Australia alongside their friends Rin Shima and Ena Saitou, an unexpected incident turns the relaxing event into quite an adventure.

Upon returning from school one day, Rin Shima encounters an unfamiliar three-wheeled motorcycle parked outside her house. After asking her father about it, she learns that the vehicle is a temporary loaner while her moped undergoes its annual maintenance. With arrangements to go camping at Yatsugatake the next day, Rin has no choice but to utilize the three-wheeler. As she embarks on her trip, Rin's traveling experience soon shifts gears, and she discovers a refined driving performance on new unexplored roads.