After the "Breakdown Phenomenon" destroyed Arata Kasuga's town and its inhabitants vanished following the disappearance of the red sun's brightness, he faced a ray of hope. Arata used a magical grimoire that his cousin and childhood pal Hijiri Kasuga gave him to create an artificial world. However, while investigating the phenomenon, his constructed world shattered when Lilith Asami emerged before him. She presented him with two options: give in the book or suffer death. Nonetheless, Arata opted for a third - attending the Royal Biblia Academy, a secret magic school. At the academy, he met six other magic users, forming the elite Trinity Seven, each with unique abilities. Together, they were bent on saving Arata's hometown and Hijiri. With an unyielding spirit and the support of newfound friends, Arata persisted until he succeeded in bringing back his beloved town and best friend.