“Awaken now, Kasuga Arata.” With those words, Arata’s uneventful, carefree life ends forever. A black shadow covers the sun and Arata’s entire town is reduced to rubble, all the people in it spirited away by the blackness of the sun in an event called a "breakdown phenomenon". As Arata’s memories come flooding back, he realizes he’s been living inside an illusion created by a powerful book of spells.Lilith Asami, a mage dispatched to investigate the phenomenon, gives Arata two choices: hand over the book, or die. Arata chooses the third option: enrolling in the top-secret magic school Royal Biblia Academy. Waiting for him at the academy are seven beautiful magic users, the Trinity Seven, each with her own power and skill.