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?!
There's something we need 
to maintain this peace.
.هناك شيء نحتاجه للحفاظ على هذا السلام
Es gibt etwas, das wir tun müssen,
um den Frieden zu erhalten.
Mantener esta paz tiene un precio.
Mantener esta paz tiene un precio.
Certaines choses sont nécessaires
pour garantir la paix.
C'è una cosa di cui abbiamo bisogno,
 per mantenere questa pace.
Há algo de que precisamos
para manutenção desta paz.
Он необходим нам для поддержания мира.