When Chiaki Oogaki and Aoi Inuyama establish the Outdoor Activities Club at their school, they are just the two of them, armed with a host of ambitious plans. The situation remains largely unchanged even after a new member, Nadeshiko Kagamihara, joins. Nevertheless, the cheerful and cozy atmosphere appears to draw many curious visitors to their modest headquarters. As the three girls embark on a camping trip to Australia with their friends Rin Shima and Ena Saitou, an unexpected incident transforms the relaxing outing into quite an adventure.