Emilia Crane, a baron's daughter, is handed an annulment of her engagement at the age of 19. "I don't want to get married anymore... Even if I lose everything, I want to live freely." Wishing for this, Emilia considers running away, but she receives a proposal from her older brother, who deeply understands her. He suggests that she utilize her rare, exceptional magical talent to become a teacher at a magic school...! The immensely popular one-shot "Since My Engagement Was Annulled, I'll Start as the Strongest Magic Teacher at an All-Boys School" has been retitled and serialized. A fantasy story where a heroine with the strongest magical power overwhelmingly crushes adversity after her engagement is broken!