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 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...