Sub-Era: After the Sinking of the Oracle

Zeno, a non-magical mortal summoned by an evil organization, was rescued by an unknown force. He accidentally came into contact with a magic weapon called the "Book of Knowledge", which opened up a mortal magic school that had been dusted for many years. In order to return to the original world, he had to hide himself, improve himself, and embark on a journey to explore the new world, constantly looking for the whereabouts of the four magic weapons until he collected them all.