Kasuga Shin (voiced by Matsuoka Yoshitsugu) is an ordinary teenager. One day, an accident caused him and his cousin Kasuga Sei (voiced by Suwa Ayaka) to be involved in a whirlpool leading to a different world. In the chaos, Shin and Sei were separated. In order to find Sei, the two returned to their original world together. Shin followed various clues and entered the Royal Academy of Books and became a transfer student there. The strict and polite Asami Lilith (voiced by Hara Yumi), the assassination expert and super action power of Kazama Levi (voiced by Sakura Ayane), the powerful magic power that keeps people away from Yamana Miroku (voiced by Hikasa Yoko), the carefree, cheerful and refreshing Fudo Akine (voiced by Yuzuka Yuzuki), the ignorant and taciturn Kannazuki Ailin (voiced by Uchida Aya), the mysterious and independent Kurata Yui (voiced by Murakawa Rie) and Liselotte (voiced by Toyama Nao). In the academy, there are seven magic book messengers with different personalities waiting for the newcomers. With their company, the academy life with laughter and tears begins.