The World is Centered Around Kokone!.Yuu goes on another exchange program, this time to Etoile Academy in Kobe, who send over their student, Kokone Kurisu, who is friends with Miyabi. Upon arriving at Starlight Academy, Kokone, used to being the center of attention, becomes downhearted that she's not as well known outside her hometown. She soon cheers up when she encounters Yotsuba, who she admired during his idol days and was her inspritation to become an idol. Upon hearing Yotsuba struggling to come up with a new donut idea, Kokone uses ingredients from her family's sweet shop to create one made using chestnuts and dried fruit, earning respect from her classmates. Afterwards, Kokone holds a concert for her restaurant's new branch opening, looking forward to the vast idol world lying ahead of her.