The narrative depicts the onset of the second spring in the story, and Tatsuya and Miyuki are currently on their spring break after completing their first year at First Magic High School. They travel to their villa situated on the Ogasawara Island archipelago hoping to enjoy some tranquility. However, their repose is soon interrupted by the arrival of Kokoa, a young woman who deserted the Naval base. She confides in Tatsuya about her sole desire.