After ending the battle against Zolgia, Basara regains his peaceful life with his two little sisters, Mio, the daughter of the previous demon lord, and Maria, her little sister who's also a succubus. As Basara pursues the preparations for the sports festival at school, one day he's attacked by a person being manipulated by magic. Recalling the strange gaze he felt at school, a suspicion of his begins to grow...
His renown as a war god isn't just idle talk.
Seinem Ruf als Kriegsgott
macht er alle Ehre.
Su reputación como el dios de la 
guerra no eran habladurías.
Su reputación del dios 
de la guerra no eran habladurías.
Son surnom de Dieu de la guerre 
n’est pas usurpé…
La sua fama di dio della guerra
 non è solo una diceria.
Não é à toa que o chamavam
 de Deus da Guerra.
Не зря его прозвали богом войны.