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...
So, at the very least, I wanted Yuki-san 
and Kurumi-san to remain friendly sisters.
Also wollte ich, dass zumindest Yuki-san
und Kurumi-san sich als Schwestern nahestehen.
Así que quería que al menos Yuki-san 
y Kurumi-san pudieran llevarse bien.
Así que quería que al menos Yuki-san y 
Kurumi-san pudieran seguir en buenos términos.
Alors je voulais au moins que Yûki 
et Kurumi continuent à bien s’entendre.
Quindi, in realtà, volevo soltanto che Yuki-san
 e Kurumi-san restassero in buoni rapporti.
Então eu queria que ao menos a Yuki-san
 e a Kurumi-san continuassem amigas.
Поэтому я хотела, чтобы хотя бы Юки 
и Куруми остались дружными сестрами.