With the cooperation of Star Police Mary Ann, the Pretty Cures successfully repelled the raiders, but when Mary Ann attempted to arrest Yuni, Yuni and Prince escaped by rocket. As a result, Lala, who temporarily lost her home, stayed at Hikaru's house. The next day, while checking Lala's candy box, Hikaru found something that looked like a gummy—a star that had fallen during yesterday's meteor shower during the battle, caught in Milky Angel's hair. It later transformed into an unseen animal, which Hikaru named "Yuma." Yuma cannot speak but possesses mysterious powers. In response to Hikaru's wish—"I want to go to Okinawa, where Elena and Madoka are on their school trip"—Yuma transported Hikaru and Lala to Okinawa. During this sudden holiday, Yuma initially only grew close to Hikaru and did not accept Lala, but after some events, gradually began to bond with Lala as well. Later, they flew to spectacular and magical places around the world, such as Iguazu Falls, Mount Yasur, the Nazca Lines, and the Uyuni Salt Flat. Along the way, they discovered that Yuma reacts to songs, and Hikaru and her friends formed a bond with Yuma through music. However, the truth is that Yuma's real identity is a planetary seed known as "Star Dew." Mary Ann informs them that Yuma must return to space to become a planet, but Lala does not want to part with Yuma, who has just become her friend. Meanwhile, five space hunters targeting Yuma appear, and Hikaru and the other Pretty Cures fight to protect Yuma from harm. However, sensing the malice of the space hunters and Lala's sorrow, Yuma begins to grow rapidly, plunging the situation into a terrifying predicament.