In this world, everyone can use magic… and in a land called the Clover Kingdom, two young men, Asta and Yuno, strive to become the Wizard King, the greatest of all magic users. Asta and Yuno were abandoned together at a church in Hage, a village in the boonies, and lived as brothers from that day onward. For some reason, however, Asta never developed the ability to use magic, even when Yuno had already mastered wind magic. Now, at last, the boys are turning fifteen, the age at which children receive their own grimoires. Asta has high hopes that receiving his grimoire will awaken his latent ability to use magic, but when the time comes…

Asta and Yuno spend six months training for the upcoming Magic Knights Entrance Exam. Everyone seems to think Yuno is sure to pass, but worries that Asta is just wasting his time.

Asta has arrived at the home of the Black Bulls, which Yami himself called the absolute worst Magic Knights Squad. He is greeted by the squad’s unique members.

The Clover Kingdom’s Magic Knights reach the dungeon’s treasure hall, but another daunting battle keeps them from reveling in their victory for long.

As life slowly returns to normal in the royal capital, the Wizard King reaches an uncomfortable conclusion about the invasion and how it came about.

The Black Bulls get a day off, which Gauche spends visiting his beloved sister Marie. Then a mysterious tragedy befalls the village—is Marie safe?

Though the Magic Knights were able to save Marie from the Devil Banishers, Nero is taken once again and Asta’s 5-leaf clover grimoire is also stolen. Suddenly, they receive a message from one of Damnatio’s subordinates and learn the true identities of the Devil Banishers and Julius orders the Black Bulls yet again to save Nero. The Black Bulls begin their investigation in the town where they think the Devil Banishers were gathering. Will they be able to find out what the enemy’s true motive?