While Kaoruko formally introduces herself as Rintaro's girlfriend to his parents, the Chidori boys, Subaru, and Madoka enjoy a day out together at the arcade-a vision of friendship beyond schools. The seasons change, and with cooler temperatures comes a highly-anticipated school event: the overnight field trip! Chidori and Kikyo may be visiting different places, but is that enough to stop Kaoruko and Rintaro from sharing new experiences with each other?