After Captain Yami saved the Black Bulls in the Underwater Temple, Yami and Asta return the stone to the Wizard King and report what happened when suddenly a large enemy force arrives at one of the Clover border cities near the Diamond Kingdom... a Great Enemy has appeared, but the Golden Dawn Magical Knights Squad is rushing in.

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...