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!
It's no fun for them to just 
try to get to the hot spring.
.ليس من الممتع لهم أن يحاولوا الوصول إلى الينبوع الحار فحسب
Sie nur den Onsen ansteuern zu lassen,
wäre doch langweilig.
S’il n’y avait que ça,
ce serait d’un ennui…
Una corsa verso 
delle sorgenti termali sarebbe troppo banale...
Chegar às fontes termais
não basta para eles.