The earth sciences club is tasked with helping out at a children's stargazing event, the club's first task with Mai as president. As Suzu and Megu help the others get the kids under control, one girl named Haruka seems disinterested until Ao tells her about how the stars represent the history of the universe. The next day, Ao comes down with a cold, so Mira and Mai come over to visit her. Later, as Mari and Mikage are focused on their exams, Mai decides to take initiative and apply for a competition.