Four young elites of Corona are sent to Gilmore high for a lesson to be learned after Chaeyoung disobeyed her grandfather. Chaeyoung, Dahyun, Tzuyu and Jeongyeon are up for a normal life in highschool until they met a shy Introvert named Mina Hiyouitozaki, who loves reading books and hanging out with her sisters Momo and Sana. Something is going on in Gilmore city ever since they met Mina. Is there more to know about Mina and her sisters? are the Hiyouitozaki Sisters say who they say they are