In a school filled with anxiety over the final exams, an astonishing rumor began to circulate. A semi-autobiographical novel, believed to be inspired by the Lilian Girls' Academy, has been published, and the author is said to be the White Rose (Rosa Gigantea)! With the novel depicting a forbidden romance between two girls, the academy is in an uproar. The past of the White Rose (Rosa Gigantea) has become a taboo, and those who know the circumstances have remained silent. Yumi and Yoshino set out to uncover the truth...!?