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...
In a moment, the special express will 
be passing through on track two.
Vorsicht auf Gleis 2, ein Zug fährt durch.
El expreso especial llegará 
muy pronto al segundo andén.
El expreso especial llegará 
muy pronto al segundo andén.
Dans un instant, un train express 
va passer sur le quai nº 2.
Il treno espresso speciale 
è in transito sul binario 2.
Em instantes, um trem expresso irá
 passar sem parar na trilha dois.
По второму пути скоро пройдёт экспресс.