The Golden Dawn was hard at work trying to get the kingdom back onto its feet. They were trying to make amends for the trouble they had caused while they were possessed. Captain Vangeance puts Alecdora Sandler in charge of a mission. Alecdora can’t hide his dislike for Yuno so he tries his best to earn more merit than him.

Julius asks Marx to do a favor for him. He wanted him to help with creating new magic items as well as take care of some bandits. Marx is accompanied by the former member of the Eye of the Midnight Sun, Sally, to the Black Bulls’ hideout in order to conduct experiments for magic item research. Next, he travels with Captain Fuegoleon and Captain Nozel to investigate the bandits. Apparently, Julius had visited even that faraway town in disguise before...

Vanessa returns home to the Witches’ Forest and goes to visit the Queen of Witches. After witnessing the mage from the Spade Kingdom that was possessed by a devil, Vanessa wanted to see if the Queen of Witches could teach her a new spell to help out her teammates. The Queen of Witches tells her she may consider helping her if Vanessa would take two witches under her wing.

Zora wanders off from the rest of the Black Bulls and heads back home to his village to visit his father’s grave. He then meets a boy from his village named Ina. Ina idolizes Zara who became the first peasant to become a Magic Knight and was training hard in hopes to be like him someday. But then, Ina is confronted by a noble boy named Kaito, who was visiting the village on vacation, and is told that his dreams are futile. Enraged, Ina tries to fight Kaito, but Zora stops him. Zora then tells Ina a little story.

Asta and the other Black Bulls continue their training in order to face off with the devil. Charmy is trying to use her cotton magic and her Sheep Cooks to create food to enhance her friends’ mana, but she realizes she lacks training. She then decides to seek out someone who can help her. Meanwhile, Gordon is also unhappy with his inability to help his friends, so he decides to go off to train on his own.

Noelle and the other Black Bulls head to Racquey to do some training, when Noelle hears a mysterious voice. Shortly after, the Black Bulls are reunited with Kahono and Kiato. The siblings ask them for help and they head down to the Underwater Temple. There, Gifso explains that a creature called the guardian has gone berserk, so in order to quell its rage, Kahono and Kiato need to present it with their song and dance. Gifso asks the Black Bulls to act as their bodyguards and Yami appoints Noelle and Finral for the job.

Though their betrothal was decided between their families, Finral tries to become a better man for Finnes’ sake. However, his impulse to instantly hit on any girl he happens to see doesn’t seem to get better, so he asks Asta to help him train... But they end up going to a mixer. Meanwhile, the members of the Blue Rose Knights want to help Charlotte out with her chances at love and invite Yami to a mixer-like setting at the same pub. What will result from both of these mixers?

Asta and Noelle return to the Black Bulls’ hideout only to get taken away by Mereoleona again. The place they were brought this time was the Vermillion estate. Waiting for them there was Captain Fuegoleon, Kirsch, Mimosa, and the sister who looked after the children at the church in Nean, Sister Theresa, who was also known as the former Magic Knight, the Crimson She-Leopard. Asta and Noelle wait in anticipation, wondering if they are going to get a new mission, but what Fuegoleon actually tells them is...

As Asta and the others were chasing the creature that lived in the cave beneath the Yultim Volcano Trail, they happened upon a dungeon. They were then ordered to explore the dungeon by the royal capital, so they split into groups and went in. They head in with Leopold and Vice Captain Randall, but those two end up running into the creature from earlier. They work together but cannot defeat the monster, which makes Leopold feel useless. At that moment, Leopold remembers the strange feeling he felt when he was fighting the elves, and...

The Black Bulls get a sudden visit from Mereleona and she drags them to the strong magic region of the Yultim Volcano. There, the Crimson Lion Kings, as well as their captain, Fuegoleon, and his younger brother Leopold, were waiting for them. Asta and Noelle remember the hot springs they had visited on their previous trip there. Finding new resolve, Magna, Luck, Charmy, Gordon, and Nero all decide to train in the fiery underground cave of the volcano!

Asta and Yuno are given permission to go home to Hage for a little while. Asta was being called a devil in the papers, but Father, Sister Lily, everyone at the church, as well as the people who even used to make fun of Asta and Yuno because they were orphans, welcomed them home with open arms. Asta and Yuno see that they had gone down the right path and all their hard work wasn’t for nothing, and then...

The Magic Knight Squad Captains decide to have a meeting about the problem with the devils that ended up involving the whole Clover Kingdom. Asta and the others who were in the Heart Kingdom were also summoned and they disclose the information they gathered in front of Julius, Damnatio, and the Captains. After hearing what Asta and the others had to report, Julius tells everyone what they need to do in order to deal with the devil Megicula.

Asta and the others manage to meet with the queen of the Heart Kingdom, Loropechika, who had also been chosen by the water spirit, Undine. They are able to confirm that the devil’s curse that they spotted in the Heart Kingdom was originating from Loropechika herself and that the devil was in the Spade Kingdom. Meanwhile, Vanessa, Magna, and Luck went to investigate the Diamond Kingdom and find it in ruins after a single mage of the Spade Kingdom had annihilated them. In order to defeat this devil, Loropechika asks Asta and the others for their help...

Thanks to Gordon’s father, Asta and the others were able to find out that there might be clues surrounding the devils in the Heart Kingdom and manage to get permission to enter the kingdom due to the fact that Mimosa had gone there previously to study overbroad. Asta, Noelle, Finral, Mimosa and Nero head to the Heart Kingdom. Asta and the others initially enjoy their trip there, but something that Langris told Finral had been bugging Finral. Suddenly, Asta and the others are faced with a rather unexpected trial. Will Asta and the other Black Bulls be able to obtain information on the devils?!

In order to find out more about the forbidden curse, Asta, Gordon, Grey, and Gauche head to Gordon's house, since he comes from a family of famous curse mages. Once they get there, they can't help but show their wariness towards Gordon's family. But in the end, they end up finding out valuable information while they're there. Meanwhile, Noelle goes to talk to the Dorothy Unsworth, the Captain of the Coral Peacocks, after her brother tells her to talk to her to find out the truth behind their mother's death. Dorothy tells her the name of the devil who had killed her mother, and the same name is spoken by Gordon's grandmother. That devil's name is...

The Black Bulls were ordered by the Wizard King to investigate the devils. Yami takes Asta and Nero and goes to talk to Captain Charlotte of the Blue Rose Knights, since she has experience with forbidden magic and curses. But when they get there, Charlotte suddenly runs off somewhere and they’re all in shock. Charlotte had memories of while Charla took over her body and fears that Yami had found out her true feelings and she ended up panicking. But then, she makes a decision.

The Black Bulls return to where their base originally was. Henry has to return the Raging Bull back into their hideout, but apparently, that takes some time. Meanwhile, Yami tells the Black Bulls to go find the magical beasts that escaped from the hideout. They had run away when Rades and the others had attacked the hideout and had been wandering around the forest ever since. There was even a chance that they had returned to their feral states. Their fear comes true, as one Black Bull is attacked after another.

After using forbidden magic in the fight against the devil, Secré turns into a bird and ends up spending centuries all alone. During that time, she ends up meeting Asta, who ends up with Licht’s grimoire that has a different devil residing in it. Patry ends up reviving due to resurrection magic, and then he becomes the leader of the Eye of the Midnight Sun and vows to get revenge. This was all according to the devil’s plan and Secré uses her sealing magic to free Lumiere and Licht so they can finish off the devil once and for all along with Asta. The battle comes to an end, and Secré now begins her new life as a member of the Black Bulls.

Because she used forbidden magic, Nero survived for centuries. In the back of her mind, memories from long ago start to replay in her head. From when Nero was still called Secré and when Secré first met the most powerful and talented mage in the Clover Kingdom, Prince Lumiere. They become friends with Licht and the other elves, but due to the evil plans of a devil, the humans end up killing all of Licht’s comrades. Because of that, Licht ends up turning into a demon and Lumiere finds him in that state. What will he have to do to protect the ones he loves?

Asta, who has the power of the devil, and Secré who used forbidden magic and turned into Nero, were called before the Magical Parliament to be judged. Asta maintains his innocence, but Damnatio Kira will do everything he can to probe that Asta is guilty. In order to save Asta and Secré, Yami shows up with the Black Bulls and they cause a ruckus. While the Black Bulls cause trouble, a few others show up...