It’s the final match in the Royal Knights Selection Test. Rill seeks inspiration for his masterpiece; Yuno and Bell are ready to try something new.

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.

The Magic Knight Squad Captains end up doing a team battle due to Julius’ suggestion. Since the citizens are still weary after the attack by the Eye of the Midnight Sun, they want to prove that they still mean to protect the kingdom and its citizens. The Magic Knights watch in anticipation as their captains split up into two teams and go all out in this battle.

Though Vangeance, the Captain of the Golden Dawn, had asked Langris to return to his duties as vice captain, he continues to distance himself from the squad. Yuno had suddenly moved up all the ranks at a decoration ceremony and Langris asks him to fight him. The rest of the squad seems shocked, but Yuno accepts Langris’ request and fights him and they have a fierce battle. But during their fight, Yuno seems to have some doubts with how Langris is fighting.

The War against the Spade Kingdom begins in earnest as the Heart Kingdom and Black Bulls come under attack by Dante and Vanica of the Dark Triad.

Due to Nacht's spell, the Devil who has been granting Asta power since the beginning has appeared physically. To master his Devil powers, Asta must battle and defeat his Devil, and force him to submit. But Asta has other plans... Meanwhile, Yuno, Noelle, and the others grow stronger in order to take their revenge against the Dark Triad.