A few months after being trained by Fanzell, Asta is able to join the Black Bulls. One day, Fanzell suddenly shows up at the Black Bulls' base. Fanzell recognized Noelle's staff and wanted to ask her about it. It was created by his fiancee, Domina, and he was thankful to find another clue as to her whereabouts. But then, more assassins who are after Fanzell also appear at the Black Bulls' base...

The first time Asta met Fanzell Kruger was shortly after he received his grimoire. In order to train with his new anti-magic sword, Asta holes up in the woods and meets Fanzell, who is looking for his missing fiancée, Dominante Code. Fanzell uses wind magic and is able to turn wind into a sword so he helps Asta train. One day while they’re in the forest, someone comes for Fanzell’s life...

After Kiten is successfully protected Yami introduces Asta to a recovery mage named Owen that works directly under the Wizard King so he can get his arms healed. Owen is known as the most powerful recovery mage in the Clover Kingdom, but Asta's arms were in a horrific condition. Finral happens to walk by the room when Owen tells Asta something about his injury, and then he tells the rest of the Black Bulls, who are shocked. The Black Bulls go to check on Asta and see that he's still not discouraged at the bad news, and they all come to a decision...

During the attack on the Clover Kingdom by the Diamond Kingdom, Yami saves the captain of the Golden Dawn, William Vangeance, from Lotus's attack. Yami then asks William a question that's been on his mind for quite some time. Meanwhile, Asta runs into Yuno in Kiten and they are confronted by Finral's younger half-brother, Langris. Langris was always beaming with potential and joined the elite Magic Knight Squad of the Golden Dawn and became the vice-captain. He also despises his older brother Finral and considers him a total failure. Langris mocks his brother as well as the other Black Bulls and Finral finally stands up to him...

The Golden Dawn continue fighting the Diamond forces. The Diamonds soon realize they are about to be overpowered when William uses his world tree magic, basically ending the fight.

The Black Bulls return home after their battle against Vetto in the Underwater Temple. Yami, Asta, and Charmy go see the Wizard King to report on the battle.

The members of the Black Bulls all surpassed their limits and defeated a powerful enemy. They manage to safely get the magic stone and successfully complete their mission, and all the members other than Captain Yami go recuperate.

The entrance exam finally comes to a close. The time has arrives for the captains to decide which candidates they want to join their squads.

Asta’s sword finally manages to take down Vetto! But that was all a part of Vetto’s plan. He manages to steal Asta’s sword and break his arm. Vetto proudly proclaims victory, but Asta doesn’t give up hope.

Asta continues his attacks against Vetto with support from Vanessa and Finral. They finally manage to land a blow on Vetto, but it’s not very effective. Vanessa and Finral remember when they were younger and much weaker.

Despite being greatly injured in the battle against Vetto, Asta stands up to face him again. Seeing this, Vanessa and Finral come to assist Asta, too.

Kahono and Noelle reach Asta and the others. Noelle is astonished at how powerful Vetto is, but Kahono remains confident. She is the granddaughter of Gifso and cherishes everyone at the Underwater Temple, which she is willing to do anything to protect.

Magna, Luck, and Gio, the most powerful Underwater Temple mage, risk their lives fighting Vetto. Asta and Kahono’s older brother, Kiato, also arrive at the scene.

One of the members of the Third Eye, Vetto, appears at the Underwater Temple along with his underlings.

Asta and the other Black Bulls are split up throughout the Underwater Temple due to Gifso’s magic. They are forced to go head-to-head with the temple mages in a battle royale.

Because of Noelle’s hard work, the Black Bulls are able to get through the harsh mana currents and safely arrive at the Underwater Temple. Everyone is nervous, since they’ve never been here before, but the underwater people welcome them with open arms.

Asta and Noelle train for their upcoming mission and meet a girl named Kahono, whose dream is to become an idol who can sing, dance, and use magic.

Entrusted with a mission by the Wizard King, Asta and the other Black Bulls head to Raquey, a place that’s surrounded by strong mana. With Captain Yami gone off somewhere, the other members decide to play around on the beach in their swimsuits.

Asta and Yuno head toward the colosseum in the royal capital for the Magic Knights Entrance Exam, while looking around and admiring all the things they’ve never seen before.

Thanks to Asta, Julius and Marx were able to undo the protection spell that was on the captives from the Eye of the Midnight Sun and ask them who the traitor among them was.