The film depicts Nadeshiko and the others, now grown-up, after some time has passed since the television anime. Rin, who now works at a small publisher in Nagoya, gets a text message from Chiaki. Yamanashi's tourism promotion organization has put Chiaki in charge of reopening a site that had closed several years ago. Upon hearing this, Rin suggests such a spacious site could be turned into a campsite. Chiaki and Rin reunite with Nadeshiko, Aoi, and Ena to launch the campsite development project. The five assemble in work clothes to mow the grass, hold planning meetings, and build a campsite from square one, in scenes reminiscent of their club days in high school.