In a world where magic is everything, Asta and Yuno are found abandoned at a church on the same day. While Yuno possesses exceptional magical powers, Asta is the only person in the world without any. At fifteen, they both receive grimoires, magical books that amplify their wielder's magic. Asta's is a rare anti-magic grimoire that nullifies and repels his opponent's spells. Despite being polar opposites, Yuno and Asta are ideal rivals, ready to face the greatest challenges and achieve their shared dream: becoming the Wizard King. Giving up is never an option!